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Beautiful Danish Data

A field guide to economics published with Danish administrative data

Why this page

Denmark links every resident, firm, hospital visit, tax return and job to a single identifier, and lets researchers work with the whole population from the 1980s onwards. This page is a reading list of the economics that has come out of that infrastructure in the top general-interest journals and in the two leading field journals for labour and public economics: what question each paper asks, what it finds, and which registers it is built from.

The list covers 155 papers. It was assembled by searching Crossref for every article in these journals whose title or abstract mentions Denmark or Danish data, and by going through the publication lists of the main Danish research groups and authors, then checking each paper. It excludes AEA Papers and Proceedings, finance journals and papers that only use Danish data as one country among many. It will still miss papers whose abstracts do not name the country, so additions are welcome. Each paper lists its datasets, key variables, data period and sample size, and the Data & samples page puts these in one sortable table. The Themes page regroups the same papers by topic, and the Variable map lists the registers and variables they rely on, at the individual and the firm level. If a paper is missing or a summary is wrong, open an issue or a pull request on GitHub.

Top 5

American Economic Review, Quarterly Journal of Economics, Journal of Political Economy, Econometrica and Review of Economic Studies.

Subjective Earnings Risk

Andrew Caplin, Victoria Gregory, Eungik Lee, Søren Leth-Petersen and Johan Sæverud · Review of Economic Studies, 2026 · Individual

Introduces a survey instrument for earnings risk that allows for quitting and being fired, fielded to Danish workers and linked to their register earnings histories. Job transitions drive subjective risk, which is many times smaller than traditional register-based estimates even after conditioning on demographics and job history, and helps explain why many hold few liquid assets.

Data
Copenhagen Life Panel (CLP) survey, January 2021 wave, linked on CPR number, Income-tax register earnings (IND), Monthly employer-employee match and earnings data (BFL/eIndkomst), Demographic, education, household composition and household wealth registers
Key variables
  • Survey: subjective probabilities of staying, quitting and being laid off
  • Survey: subjective earnings distributions conditional on each job transition
  • Benchmark: realized job transitions, time out of work and earnings growth in 2021 (administrative)
  • Weights: population weights from a survey-participation model on 2020 administrative data
Period
Survey January 2021; administrative data through 2022
Sample
10,942 employed respondents (gross sample 14,683 respondents aged 20–65) Copenhagen Life Panel respondents aged 20–65 who were employed at the time of the January 2021 survey. source

Labour markets, wages and sorting Household finance, saving and consumption Measurement and methods

Disaggregated Economic Accounts

Asger Lau Andersen, Kilian Huber, Niels Johannesen, Ludwig Straub and Emil Toft Vestergaard · Quarterly Journal of Economics, 2026 · Individual + firm

Builds a system of national accounts broken down into bilateral money flows between region-by-industry consumer cells, producer cells, the government and the rest of the world, and implements it for Denmark using bank transaction data and registers. Spending is locally and urban biased, and fiscal transfers raise GDP more when targeted at cells whose spending reaches cells with high unemployment.

Data
Danske Bank geo-coded transaction-level data (about 20% of Danish adult consumers), 2018–2019, Government tax and income registers (labour compensation, mixed income, interest, dividends, transfers), Employment registers linking adults to industry of main employment and region, Danish national accounts (SNA positions, input-output tables), 2018, CrediWire producer-to-producer transactions (about 5 million), Firm-level export and import data for manufacturing firms
Key variables
  • Outcome: bilateral cell-to-cell flows (consumer spending, labour and profit income, taxes, transfers, intermediates trade)
  • Unit: consumer cells (industry of main employment x region of residence)
  • Unit: producer cells (industry x region of establishments)
  • Derived: domestic spending share, gravity, urban bias and spending intensity measures
Period
2018 (consumer spending 2018–2019)
Sample
approx. 2,700 consumer cells and approx. 2,600 producer cells; around 43 million entries All Danish adults and production establishments grouped into region-by-industry cells, with consumer spending measured from Danske Bank customers. source

Macroeconomics and expectations Firms, ownership and innovation

Beliefs About the Economy Are Excessively Sensitive to Household-Level Shocks: Evidence from Linked Survey and Administrative Data

Dmitry Taubinsky, Luigi Butera, Matteo Saccarola and Chen Lian · Quarterly Journal of Economics, 2026 · Individual

Links Statistics Denmark's consumer expectations survey to the registers to show that people's inflation forecasts and backcasts move strongly, and negatively, with their own recent and expected income changes, far more than actual inflation does. The pattern departs from Bayesian rational expectations and is consistent with affect-cued recall, where bad personal events cue pessimistic recollections.

Data
Danish Consumer Expectations Survey (Statistics Denmark Omnibus), linked on CPR, Tax registers from SKAT: income, liquid assets, net wealth, taxes (IND, formue), Civil Registration System / Population register (CPR/BEF), Education register (UDDA), National Patient Register (LPR), emergency room visits 1994–2018
Key variables
  • Outcome: inflation forecasts and backcasts (qualitative and quantitative)
  • Explanatory: recent change in household log nominal income (t-1 vs t-2)
  • Explanatory: future household income change and expected household financial situation
  • Shock: family emergency room visit in the survey month
  • Benchmark: realized inflation
Period
2012–2019 (robustness from 2008; population registers from 1991)
Sample
35050 usable responses (from 55171 survey respondents aged 25–60) Danish Consumer Expectations Survey respondents aged 25–60 in 2012–2019 without substantial self-employment income and with complete answers, linked to administrative data. source

Macroeconomics and expectations Household finance, saving and consumption

Fertility and Family Labor Supply

Katrine Jakobsen, Thomas H. Jørgensen and Hamish Low · American Economic Review (forthcoming), 2026 · Individual

Uses the 2009 Danish tax reform to show that higher net-of-tax wages for women reduce fertility while higher wages for men raise it. A life-cycle model of couples choosing the timing and number of children, estimated on register data, implies that allowing fertility to adjust raises women's labour supply responsiveness substantially and that human capital depreciation around births drives much of the long-run gender wage gap.

Data
Monthly payroll records (BFL/eIndkomst), Annual income tax data (IND), Population and family register (BEF), family definitions and parent links, Education register (UDDA), Labour market experience from ATP payments, Parental leave spell register (OF)
Key variables
  • Outcome: fertility (births)
  • Treatment: 2009–2018 tax reform changes in marginal net-of-tax wage rate
  • Outcome: labour market participation, part-time and full-time work from pay-slip hours
  • Outcome: annual labour income
  • Control: education (high vs less skilled), labour market experience
Period
2004–2018 (tax sample 2004–2018; estimation sample 2010–2018)
Sample
10,851,444 individual-year observations (estimation sample); 2,531,181 (tax sample) Danish individuals aged 25–60 with an opposite-sex partner, not students, self-employed, retired or on disability pension; tax sample restricted to cohabiting or married women aged 25–40. source

Gender and the family Family responses and insurance Taxation and public finance Labour markets, wages and sorting

Effects of Parental Death on Labor Market Outcomes

Mathias Fjællegaard Jensen and Ning Zhang · American Economic Review, 2026 · Individual

Uses sudden first parental deaths and matched controls in Danish administrative data. Earnings fall by about 2 percent for men and 3 percent for women, mental health worsens for both, and women with young children lose the most, around 4 percent, consistent with the loss of informal childcare from grandparents.

Data
Cause of death registers (DODSAARS/DODSAARG), Population register with parent-child links (BEF), Income and labour market registers (IND, AKM, IDAS/IDAN/IDAP), ATP-based hours proxy, Health Insurance Register for GP/psychologist/psychiatrist visits (SYSI/SSSY), National Patient Register (LPR_ADM/LPR_DIAG), Psychiatric Central Research Register (PSYK_ADM/PSYK_DIAG), Prescription register (LMDB), Childcare registers (DAGI/BOERNFB)
Key variables
  • Treatment: first sudden parental death (heart disease, cerebrovascular disease, acute respiratory infection, accidents)
  • Outcome: annual earnings (indexed to pre-death gender mean)
  • Outcome: employment and hours proxy
  • Outcome: mental health care use and prescriptions
  • Control group: matched not-yet-treated individuals
Period
1980–2019 (parental deaths 1985–2014)
Sample
Treated: 21919 daughters and 24354 sons whose mother died first; 74991 daughters and 85022 sons whose father died first (plus matched controls) Danish adults aged 25–50 with two known parents who experienced a sudden first parental death between 1985 and 2014, with matched controls. source

Family responses and insurance Labour markets, wages and sorting Health

Germs in the Family: The Short- and Long-Term Consequences of Intrahousehold Disease Spread

N. Meltem Daysal, Hui Ding, Maya Rossin-Slater and Hannes Schwandt · American Economic Review, 2026 · Individual

Shows that infant younger siblings are hospitalised for respiratory conditions two to three times as often as their older siblings were, because preschool-aged children bring disease home. Combining birth order with local variation in respiratory disease prevalence, early-life exposure lowers younger siblings' later earnings and education and worsens chronic respiratory and mental health.

Data
National Patient Register (LPR), Medical Birth Register (MFR), Population register (BEF), Register-Based Labour Force Statistics (RAS), Income Statistics Register (IND), Education Register (UDDA), Academic Achievement Register (9th grade test scores), Psychiatric Central Research Register (PCRR), Health Insurance Register (Sygesikringsregisteret), Childcare enrollment data, National Child Database (breastfeeding)
Key variables
  • Outcome: acute respiratory hospitalizations in the first year of life
  • Treatment: birth order (second-born vs first-born) interacted with municipality respiratory disease exposure index
  • Outcome: earnings, labour force participation and income rank at ages 18–32
  • Outcome: high school and college completion; 9th grade test scores
  • Outcome: chronic respiratory and mental healthcare use
Period
Children born 1981–2017; outcomes 1980–2019
Sample
1,230,180 children First- and second-born singleton siblings born in Denmark 1981–2017, at least 11 months apart, in 91 municipalities. source

Health Children, intergenerational mobility and skills Family responses and insurance

The Direct and Indirect Effects of Online Job Search Advice

Steffen Altmann, Anita M. Glenny, Robert Mahlstedt and Alexander Sebald · Review of Economic Studies, 2026 · Individual

A large two-stage randomised experiment on the Danish public employment service's online platform gave job seekers vacancy information and occupational recommendations, with treatment intensity varying by region. Advice raises employment and earnings when few job seekers receive it, but the gains vanish at high intensity because treated job seekers crowd into the same occupations.

Data
Field experiment on jobnet.dk (Danish public employment service platform): treatment assignment and dashboard exposure, Jobnet job search profiles, vacancy information and registered job applications (with occupation codes), Statistics Denmark register data on employment, hours and earnings (12 months after start), Population registers and benefit payment records (UI recipients), Register data on the universe of unemployment-to-job occupational transitions (to build recommendations)
Key variables
  • Treatment: occupational recommendations, vacancy information, or both (individual randomization)
  • Treatment intensity: municipality cluster share of treated job seekers (two-stage randomization)
  • Outcome: working hours and earnings in the year after intervention
  • Outcome: job applications by occupation (search strategy)
Period
Intervention from March 17, 2019; outcomes over the following 12 months (before March 2020)
Sample
92,098 individuals All individuals registered as unemployed and receiving UI benefits in Denmark on March 17, 2019. source

Labour markets, wages and sorting

Changing Tracks: Human Capital Investment after Loss of Ability

Anders Humlum, Jakob R. Munch and Pernille Plato · American Economic Review, 2025 · Individual

Uses quasi-random work accidents in Danish administrative data to show that injured workers enrol in bachelor's programmes that build on their previous training. Exploiting differences in how stackable degrees are, higher education moves injured workers from disability benefits into full-time jobs paying 25 percent more than before injury, and reskilling subsidies pay for themselves four times over.

Data
Industrial Injury Register (Arbejdsskaderegisteret) / workers' compensation claims from AES, National Patient Register (LPR), Health Insurance Register (Sygesikringsregisteret), Prescription Drug Database (LMDB), Education Register (UDDA), Course Participant Register (VEUV), Danish Register for Evaluation of Marginalization (DREAM), Integrated Database for Labour Market Research (IDA), linked to O*NET, Population register (BEF/POP)
Key variables
  • Treatment: work accident causing loss of earning capacity (vs. matched non-injured workers)
  • Outcome: enrollment in and completion of formal degrees and courses
  • Outcome: earnings, hours and occupation (task content)
  • Outcome: disability and other social transfers
  • Severity: assessed earning capacity loss and personal impairment
Period
1995–2017 (work injury claims 1998–2017)
Sample
14,481 injury events (14,369 distinct individuals); 4,568 events (4,528 individuals) for workers with vocational degrees with access to higher education Full-time employed Danish workers (excluding military) who suffered an accepted physical work accident with positive earning capacity loss, compared with matched non-injured workers. source

Labour markets, wages and sorting Education Health

Micro versus Macro Labor Supply Elasticities: The Role of Dynamic Returns to Effort

Henrik Kleven, Claus Thustrup Kreiner, Kristian Larsen and Jakob Egholt Søgaard · American Economic Review, 2025 · Individual

Builds a model in which effort today raises earnings tomorrow, so responses to taxes are delayed and mediated by job switches. Danish administrative data confirm the model's life-cycle predictions for earnings and hours, and a quasi-experimental design based on job switchers finds a long-run earnings elasticity around 0.5, against a short-run elasticity of about 0.2.

Data
Linked administrative registers on earnings, occupation (DISCO), firm and demographics, full population, Employer-employee matched data (firm x occupation job cells), ATP pension contribution-based hours measure (1980–2018), Monthly uncapped hours measure (from 2008), Income tax records (2009 tax reform variation)
Key variables
  • Outcome: earnings (log earnings changes)
  • Treatment: 2009 tax reform change in marginal net-of-tax rate
  • Instrument: simulated net-of-tax rate change at baseline income
  • Mediator: job switches (firm x occupation cell), incl. mass-layoff switches
  • Outcome: hours worked
Period
1980–2018
Sample
N = 2,501,126 and 2,428,411 in the main elasticity regressions (Table 1) Full Danish population; tax-reform analysis uses taxpayers with baseline income between 250,000 and 1,000,000 DKK. source

Taxation and public finance Labour markets, wages and sorting

Untying the Knot: How Child Support and Alimony Affect Couples' Dynamic Decisions and Welfare

Hanno Foerster · Review of Economic Studies, 2024 · Individual

Estimates a dynamic model of family labour supply, home production, saving and divorce on Danish register and survey data to study post-marital maintenance payments. Alimony carries larger labour supply disincentives and insures consumption less efficiently than child support, so welfare rises when child support is increased and alimony reduced.

Data
Danish register data on income, labour force status and hours worked, Marital histories and birth register (BEF/family links), Maintenance (child support and alimony) payment records and child residence after divorce, Danish Time Use Survey 2001 (DTUS)
Key variables
  • Outcome: labour supply (employer-recorded hours bins) and annual labour income
  • Outcome: divorce
  • Policy: child support and alimony (maintenance) payments
  • Survey: housework hours and relative consumption in couples (DTUS)
Period
1980–2013
Sample
322,732 couples (645,464 individuals) and 4,312,826 couple-year observations; DTUS 2,105 households Danish couples in their first marriage, both spouses aged 25–58, at least one working, excluding couples with children from previous relationships. source

Family responses and insurance Gender and the family Labour markets, wages and sorting

On the Family Origins of Human Capital Formation: Evidence from Donor Children

Petter Lundborg, Erik Plug and Astrid Würtz Rasmussen · Review of Economic Studies, 2024 · Individual

Uses Danish children conceived through sperm and egg donation to separate nurture from genetic transmission, since donors are not selected on parental traits. Only mothers' education matters once genes are removed: fathers' schooling has no effect on children's test scores, while mothers' schooling raises reading scores as much as among non-donor children.

Data
Danish IVF register (Danish Health Data Authority), Danish Education Register (UDDA), National test scores in reading and math (from 2010), Administrative registers on demographics and labour market (birth year, gender, marital status, children, earnings)
Key variables
  • Outcome: child average standardized national test score (reading and math)
  • Explanatory: mother's and father's years of schooling
  • Variation: donor sperm / donor egg conception (genetically unrelated parent)
  • Controls: month of first donor treatment and clinic fixed effects (waiting-list assignment)
Period
IVF treatments 1994–2007; demographics 1991–2016; labour market 1991–2012; tests from 2010
Sample
19,509 non-donor IVF children, 820 sperm donor children and 157 egg donor children (97 matched to egg donors) Children conceived through IVF treatments in Denmark 1994–2007 with at least one national test score, compared with 30% random samples of non-adopted (650,930) and adopted (2,674) children. source

Children, intergenerational mobility and skills Education Family responses and insurance

Tapping into Talent: Coupling Education and Innovation Policies for Economic Growth

Ufuk Akcigit, Jeremy Pearce and Marta Prato · Review of Economic Studies, 2024 · Individual

Builds an endogenous growth model with heterogeneous talent, financial resources and career choice, and links it to Danish micro data on who obtains a PhD and who becomes an inventor. R&D subsidies work better when combined with higher education subsidies that let talented but poor youth pursue research, and education policy matters most in unequal societies.

Data
Integrated Database for Labour Market Research (IDA), Firm-linked IDA (FIDA), PhD enrolment register (PHD), Military conscription IQ test (Boerge Prien Proeve), European Patent Office patents linked to IDA, R&D funding data (Innovation Danmark) and Ministry of Education PhD policy data
Key variables
  • Outcome: PhD enrolment/attainment
  • Outcome: patent filing (inventor status)
  • Talent proxy: military IQ test score
  • Background: parental income
  • Policy: 2002 expansion of PhD slots and R&D subsidies
Period
2001–2013 (background data from 1980)
Sample
approximately 32 million employer-employee observations, 10,000 inventors and 37,000 unique PhDs; approximately 500,000 males with IQ data Danish population in IDA linked to PhD, IQ test and patent data. source

Innovation Education Inequality and fairness

Social Positions and Fairness Views on Inequality

Kristoffer B. Hvidberg, Claus T. Kreiner and Stefanie Stantcheva · Review of Economic Studies, 2023 · Individual

Links a large survey to income registers to compare perceived and actual positions in the income distribution and within reference groups (co-workers, neighbours, schoolmates). People misperceive their rank, fairness views depend on the perceived gap to others, and showing people their true position changes their views.

Data
Custom online survey with randomised information treatment (February–March 2019), sent via Digital Post and linked on CPR, Income registers / tax returns (IND) for respondents and all reference group members, Population register (BEF) for cohort, municipality, neighbours and siblings, Education register (UDDA) incl. school attended at age 15 for schoolmates, Workplace links from employer-employee data (IDA) for co-workers and sector, Parents' income positions via family links
Key variables
  • Outcome: perceived own income position (rank) in each reference group
  • Outcome: perceived P50 and P95 incomes in reference groups
  • Outcome: fairness views on inequality within reference groups
  • Actual income rank computed from register data
  • Treatment: randomised information on actual income position
  • Events: unemployment, promotion and income shocks from income histories
Period
Survey 2019 (income for 2017); register income histories
Sample
9,415 respondents (from 50,100 invited) Danish-born people born 1969–1973 (aged 45–50), randomly drawn by Statistics Denmark, who completed the survey. source

Inequality and fairness

The Anatomy of Sorting: Evidence from Danish Data

Rasmus Lentz, Suphanit Piyapromdee and Jean-Marc Robin · Econometrica, 2023 · Individual + firm

Estimates a flexible model of worker and firm heterogeneity in wages and job mobility on Danish matched employer-employee data. Workers and firms sort positively, with sorting operating through both wages and non-wage amenities, and worker heterogeneity accounts for the bulk of wage dispersion.

Data
Matched employer-employee register data (IDA) with annual wages, Weekly labour market spell/mobility data built from Statistics Denmark registers
Key variables
  • Outcome: log wage rate
  • Job-to-job mobility and transitions to and from non-employment (weekly)
  • Latent worker and firm types (finite mixture, classification EM)
  • Controls: gender, education, potential experience, tenure, calendar time
  • Sorting channels: job preferences, segmentation, layoffs, job finding
Period
1985–2013 (analysis panel starts 1987)
Sample
Not stated in the sources checked Danish workers after completing education, employment spells starting before age 50, followed weekly across employers from 1987 to 2013 (read from the 2018 predecessor working paper). source

Labour markets, wages and sorting

Equilibrium Trade in Automobiles

Kenneth Gillingham, Fedor Iskhakov, Anders Munk-Nielsen, John Rust and Bertel Schjerning · Journal of Political Economy, 2022 · Individual

Develops and estimates a dynamic equilibrium model of the market for new and used cars with heterogeneous households on the universe of Danish car ownership records, which record every vehicle's owner, age and scrappage. The model is used to evaluate Denmark's very high registration taxes and fuel taxes, showing how tax changes propagate through used-car prices and the age distribution of the fleet.

Data
Car ownership register covering all privately owned cars (Statistics Denmark extract), Odometer readings from mandatory vehicle inspections (driving), Demographic and income registers for all Danish households, Tax deduction for commuting distance (work distance), Fuel prices from eof.dk
Key variables
  • Outcome: car ownership transitions (keep, trade, buy new, scrap)
  • Car types: four classes by weight and fuel efficiency, 25 age groups
  • Household types: couple/single, high/low income, high/low work distance
  • Outcome: kilometres driven
  • Policy variable: new car registration tax and fuel tax
Period
1996–2008 (estimation 1997–2008)
Sample
nearly 39 million observations on car ownership transitions All Danish households and all cars owned by private individuals, 1996–2008. source

Household finance, saving and consumption Taxation and public finance Measurement and methods

Reference Dependence in the Housing Market

Steffen Andersen, Cristian Badarinza, Lu Liu, Julie Marx and Tarun Ramadorai · American Economic Review, 2022 · Individual

Combines Danish housing listings and transactions with register data on owners to estimate a structural model of listing and sale decisions with loss aversion and financial constraints. Households derive utility from gains over the original purchase price and weigh losses about 2.5 times more than gains, which helps explain the co-movement of house prices and turnover.

Data
Property ownership and transaction register from SKAT and the Building and Housing Register (BBR), 1992–2016, Tax-assessed property values (SKAT), Property listings data from RealView, 2008–2016, Loan-level mortgage data from Danmarks Nationalbank, 2009–2016, Civil Registration System (CPR/BEF) for demographics and household links, Income and wealth records from SKAT (IND/formue)
Key variables
  • Outcome: listing decision and listing premium relative to hedonic value
  • Main regressor: potential gain or loss relative to original purchase price (reference point)
  • Potential home equity relative to down-payment constraint
  • Expected house value from hedonic pricing model
  • Structural parameter: loss aversion
Period
2009–2016 (transactions from 1992)
Sample
214,103 listings (191,507 unique households, 178,933 unique properties); housing stock of 5,538,052 observations of 807,345 properties Listings of Danish owner-occupied housing between 2009 and 2016, both sold and retracted, matched to mortgages and household finances. source

Housing Household finance, saving and consumption

Globalization, Gender, and the Family

Wolfgang Keller and Hale Utar · Review of Economic Studies, 2022 · Individual + firm

Men and women hit by the same import shock from China adjust differently. Women in their late thirties who are displaced respond by having a child, especially high earners and those who would need to retrain, so a gender-neutral trade shock produces a long-run gender gap through the biological clock.

Data
Integrated Database for Labour Market Research (IDA), Central Population Register (CPR/BEF) for births, marriages, divorces and cohabitation, Domestic production database by 10-digit product (Industrial commodity statistics, VARS) to identify firms making quota goods, Industry-level imports from China and other advanced countries (instrument), Parental leave records
Key variables
  • Outcome: new births, marriage, divorce, parental leave
  • Outcome: earnings, hours, unemployment
  • Treatment: 1999 employer produces goods subject to MFA quota removal for China after WTO entry
  • Treatment (economy-wide): industry import penetration from China, instrumented with other countries' imports
  • Heterogeneity: gender and age (biological clock)
Period
1999–2007
Sample
about 1,600,000 workers; about 10,000 textile and clothing workers The 1999 cohort of full-time Danish private-sector workers aged 18–56, followed through 2007. source

Trade and offshoring Gender and the family Family responses and insurance Labour markets, wages and sorting

The Returns to Nursing: Evidence from a Parental-Leave Program

Benjamin U. Friedrich and Martin B. Hackmann · Review of Economic Studies, 2021 · Individual + firm

A Danish parental-leave programme offering up to a year off per child aged 0 to 8 induced a nurse shortage that hospitals and nursing homes could not replace. Nurse employment fell by 15 percent in hospitals and 10 percent in nursing homes, 30-day readmissions of heart attack patients rose, and nursing home mortality increased sharply.

Data
Integrated Database for Labour Market Research (IDA) for health workers, plants and industries, Population register (BEF) for children's ages, residence and household characteristics, Social benefits records of parental leave spells (from 1995), National Patient Register (LPR), inpatient hospitalisations 1990–2000, Register of Causes of Death (DAR), 1991–2000
Key variables
  • Treatment: 1994 parental leave programme; exposure = share of nurses eligible times estimated take-up, by health sector and county
  • Outcome: nurse employment in hospitals and nursing homes
  • Outcome: 30-day hospital readmission rates and other quality-of-care measures
  • Outcome: nursing home (elderly) mortality
  • Eligibility: having a youngest child aged 8 or younger
Period
1990–2000
Sample
Not stated in the sources checked Danish nurses, nursing assistants and doctors, and hospital patients and nursing home residents, aggregated to health sector by county, 1990–2000. source

Health Labour markets, wages and sorting

Child's Gender, Young Fathers' Crime, and Spillover Effects in Criminal Behavior

Christian Dustmann and Rasmus Landersø · Journal of Political Economy, 2021 · Individual

Uses the gender of a first-born child as a natural experiment for young fathers in Denmark. Having a son rather than a daughter lowers the father's subsequent criminal behaviour, and the reduction spills over to the father's peers and later to the child, which identifies both a direct parenting response and network effects in crime.

Data
Birth register (child's gender, parent links), Population register (BEF) for demographics and family links, Central Police Register crime data (charges and convictions), Victim register (from 2001), Income, education and occupation registers, Residential register with neighbourhood classification
Key variables
  • Outcome: young father's crime convictions and charges
  • Treatment: first child is a son vs a daughter
  • Spillover outcome: crime of male peers in the father's neighbourhood
  • Peer group: males within ±3 years of father's age in the same neighbourhood
  • Outcome: neighbourhood crime victimisation
Period
Children born 1991–2004; crime data from 1990
Sample
2,803 first-time fathers aged 20 or younger; 101,132 male peers in 2,114 neighbourhoods Danish men who fathered their first child at age 20 or younger between 1991 and 2004, plus male peers in their neighbourhoods. source

Crime Family responses and insurance Children, intergenerational mobility and skills

Estimation of a Roy/Search/Compensating Differential Model of the Labor Market

Christopher Taber and Rune Vejlin · Econometrica, 2020 · Individual + firm

Combines a Roy model, search frictions, compensating differentials and on-the-job human capital accumulation in one framework, establishes what is non-parametrically identified, and estimates it on Danish matched data. Pre-market skills account for most wage variation, while preferences for non-wage job attributes and search frictions matter greatly for turnover and for which jobs workers choose.

Data
Weekly labour market spell data built from Statistics Denmark registers (all individuals aged 15–74), Integrated Database for Labour Market Research (IDA) with hourly wage measure, Danish Work Environment Cohort Study surveys (1995 and 2000) on reasons for job separation
Key variables
  • Outcome: log hourly wage (detrended)
  • Job-to-job transitions between establishments (revealed preference)
  • Employment and non-employment spell durations
  • Worker skill/education group and labour market experience
  • Decomposition of wage variance into skill, search, compensating differential and human capital components
Period
1985–2003
Sample
2,969,454 workers, 25,630,532 spells and 467,983 establishments (estimation sample) Danish workers after labour market entry and up to age 55, followed in weekly spell data across establishments, 1985–2003. source

Labour markets, wages and sorting

Wealth Taxation and Wealth Accumulation: Theory and Evidence from Denmark

Katrine Jakobsen, Kristian Jakobsen, Henrik Kleven and Gabriel Zucman · Quarterly Journal of Economics, 2020 · Individual

Exploits the 1989 Danish wealth tax reform, which cut rates sharply for the wealthy, to estimate long-run effects of wealth taxes on wealth accumulation. Responses are sizable for the very wealthy (top one percent) and small for the moderately wealthy, with effects that keep growing over a decade.

Data
Administrative wealth registry (third-party reported assets and debts, since 1980), Income registers and socio-economic registers (occupation, family composition)
Key variables
  • Outcome: log taxable wealth and third-party reported wealth
  • Treatment: 1989 wealth tax cut (unbound vs bound by tax ceiling: ceiling DD)
  • Treatment: doubling of couples' exemption threshold (couples DD)
  • Running variable for bunching: taxable wealth around exemption threshold
  • Controls: pre-reform portfolio shares and income deciles
Period
Wealth data since 1980; quasi-experimental panel 1985–1996
Sample
138,384 observations (ceiling DD) and 520,452 observations (couples DD, couples vs couples) Balanced panels of Danish households in the top 1% (ceiling DD) or married couples in the top 5% (couples DD) of the wealth distribution before the 1989 reform. source

Taxation and public finance Inequality and fairness Household finance, saving and consumption

Sources of Inaction in Household Finance: Evidence from the Danish Mortgage Market

Steffen Andersen, John Y. Campbell, Kasper Meisner Nielsen and Tarun Ramadorai · American Economic Review, 2020 · Individual

Many Danish households fail to refinance fixed-rate mortgages when it is clearly profitable. A model with inattention and psychological refinancing costs fits the data, and both frictions are stronger for households with less education, income and financial wealth.

Data
Loan-level mortgage data for all Danish mortgages from Danmarks Nationalbank (via mortgage bank associations), Civil Registration System / population register (CPR/BEF) for demographics and household links, Income and wealth data from the Danish Tax Authority (SKAT) (IND/formue), Education register (UDDA)
Key variables
  • Outcome: refinancing of a fixed-rate mortgage in a quarter
  • Incentive: financial gain from refinancing given coupon and market rates
  • Structural parameters: probability of inattention and psychological refinancing cost
  • Household characteristics: age, education, income, housing and financial wealth
Period
2009–2017
Sample
2,376,815 household observations (9,351,183 household-quarters); 378,421 refinancings Danish households holding a single fixed-rate mortgage observed in consecutive years, 2009–2017. source

Household finance, saving and consumption

Time Discounting and Wealth Inequality

Thomas Epper, Ernst Fehr, Helga Fehr-Duda, Claus Thustrup Kreiner, David Dreyer Lassen, Søren Leth-Petersen and Gregers Nytoft Rasmussen · American Economic Review, 2020 · Individual

Links incentivised time-discounting experiments to the wealth positions of a large sample of middle-aged Danes in the registers. Patient individuals sit markedly higher in the wealth distribution, and the association survives controls for education, income profiles, school grades, initial and parental wealth, credit constraints and risk preferences, which points to saving behaviour as the channel.

Data
Incentivised online convex time budget experiment (February 2015) linked on CPR, Income and wealth registers based on third-party reports (1980–2015), Population register (BEF) for sampling and demographics, Education and family registers, Survey of time discounting for the 1952–1955 cohorts at ages 18–21
Key variables
  • Outcome: individual's percentile rank in the net wealth distribution
  • Main regressor: experimentally measured patience (time discounting)
  • Controls: education, income, parental wealth, risk attitudes
  • Heterogeneity: credit-constrained vs unconstrained individuals
Period
Experiment in 2015; register data 1980–2015 (wealth ranks tracked 2001–2015)
Sample
3,620 experiment participants (of 27,613 invited); 2,548 survey subjects in the 1952–1955 cohorts Danes born 1973–1983 who lived in Copenhagen municipality at age seven and completed the online experiment. source

Household finance, saving and consumption Inequality and fairness

Tax Evasion and Inequality

Annette Alstadsæter, Niels Johannesen and Gabriel Zucman · American Economic Review, 2019 · Individual

Matches leaked offshore account data (HSBC Switzerland, Panama Papers) and tax amnesty records to Scandinavian wealth registers. Tax evasion rises steeply with wealth: the top 0.01 percent evade about a quarter of their taxes, which materially raises measured top wealth shares.

Data
Leaked HSBC Switzerland client list (Swiss Leaks, 2007) matched to tax records in Denmark, Norway and Sweden, Panama Papers / Mossack Fonseca leak matched to Norwegian and Swedish wealth data (not Denmark), Tax amnesty voluntary disclosures in Norway and Sweden, Population-wide administrative wealth and income tax records for Norway, Sweden and Denmark, Danish stratified random tax audits by SKAT (tax years 2008, 2010, 2012), National accounts household wealth totals
Key variables
  • Outcome: taxes evaded (share of taxes owed) by wealth group
  • Ranking variable: household net wealth including imputed pension wealth
  • Indicator: owning an undeclared HSBC account / Panama Papers shell / amnesty participation
  • Outcome (event study): reported wealth and income after amnesty
  • Random-audit detected evasion (domestic evasion)
Period
HSBC leak 2006–2007; amnesties since 2006; Danish random audits for tax years 2008, 2010, 2012
Sample
520 HSBC households; 165 Panama Papers households; 1,422 amnesty taxpayers in Norway and 6,811 in Sweden; 18,985 randomly audited Danish taxpayers Scandinavian households appearing in offshore leaks or tax amnesties, ranked in the full population wealth distribution, combined with Danish random audits. source

Taxation and public finance Inequality and fairness

Refugee Migration and Electoral Outcomes

Christian Dustmann, Kristine Vasiljeva and Anna Piil Damm · Review of Economic Studies, 2019 · Individual

Using the quasi-random refugee dispersal policy, refugee allocation raised vote shares for anti-immigration parties in rural municipalities and lowered them in the largest urban municipalities. Effects are strongest where refugees are few relative to natives and where crime rises after allocation.

Data
Population register (BEF) to identify refugees and municipality of initial placement, Income, education, labour force and socio-economic registers for 1985 municipality characteristics, Statistics Denmark municipal and parliamentary election results, Danish National Election Survey (DNES) 1990–98
Key variables
  • Outcome: change in vote share of anti-immigration parties (Progress Party, Danish People's Party)
  • Treatment: cumulative share of allocated refugees in municipal population (1986 base)
  • Source of variation: Danish Spatial Dispersal Policy allocation of refugees 1986–98
  • Heterogeneity: urban vs rural municipality
  • Controls: 1985 municipality characteristics
Period
Refugee allocation 1986–1998; parliamentary elections 1990–98 and municipal elections 1989–97
Sample
275 municipalities (550 observations for parliamentary elections); 76,673 refugees allocated 1986–98 All 275 Danish municipalities observed across election cycles during the 1986–98 refugee dispersal policy. source

Migration, neighbourhoods and refugees Political economy

Consumption Network Effects

Giacomo De Giorgi, Anders Frederiksen and Luigi Pistaferri · Review of Economic Studies, 2019 · Individual + firm

Measures household consumption from Danish tax records on income and assets and defines peer groups by workplace using matched employer-employee data. Instrumenting peers' consumption with shocks to their own non-overlapping networks and firms, the paper finds sizeable consumption spillovers that can generate macro multipliers, operating through both intertemporal and intratemporal channels.

Data
Administrative income and wealth tax records (tax registry incl. wealth tax data), Integrated Database for Labour Market Research (IDA) for plant IDs and coworker networks, Danish Expenditure Survey (DES) 1994–1996
Key variables
  • Outcome: household consumption imputed from income and change in assets
  • Endogenous regressor: average consumption of coworkers' households (peer consumption)
  • Instruments: firm-level shocks to distance-3 (non-overlapping) network members
  • Network definition: coworkers in the same plant
  • Mechanisms: budget shares of visible goods (DES)
Period
1980–1996
Sample
757,439 households Danish households with head aged 18–65 where both spouses are working employees, linked to spouses' coworkers. source

Household finance, saving and consumption Labour markets, wages and sorting

Family Health Behaviors

Itzik Fadlon and Torben Heien Nielsen · American Economic Review, 2019 · Individual

A severe health shock to one family member, such as a heart attack or stroke, makes spouses and adult children raise their own preventive behaviour: more check-ups, more preventive medication and lifestyle changes. Responses are sharp, immediate and persistent, and they reflect updating about one's own risk.

Data
Prescription Drug Database (LMDB), 1995–2011, Health Insurance Registry (SSR, primary-care and specialist contacts), 1985–2011, National Patient Registry (LPR), inpatient 1980–2011 and outpatient 1994–2011, Cause of Death Registry (DAR), Integrated Database for Labour Market Research (IDA) for demographics, education and coworker links, Family links (spouses, parents–children) from population registers
Key variables
  • Treatment: family member's first heart attack or stroke (non-fatal), or death (fatal shock)
  • Outcome: statin and other cardiovascular drug take-up
  • Outcome: preventive care such as GP visits and cholesterol testing
  • Control group: households experiencing the same shock five years later
  • Exposure groups: spouses, adult biological children, siblings, in-laws, coworkers
Period
1980–2011 (shocks between 1985 and 2011)
Sample
Non-fatal shocks, spouses: 20,381 treated and 28,699 control (prime age 25–55), 37,828 treated and 36,392 control (older 55–85); biological children: 63,323 treated and 68,437 control (25–40), 39,783 treated and 32,926 control (40–65) Family members and close coworkers of all Danish individuals who had a first heart attack or stroke (or died) between 1985 and 2011. source

Health Family responses and insurance

An Empirical Model of Wage Dispersion with Sorting

Jesper Bagger and Rasmus Lentz · Review of Economic Studies, 2019 · Individual + firm

Estimates an equilibrium search model with endogenous search intensity and two-sided heterogeneity on Danish matched data. Finds positive assortative matching between worker and firm productivity, and quantifies how much of wage dispersion is due to sorting versus search frictions.

Data
Weekly labour market spell data from administrative registers (jobs reported to tax authorities, public transfers, mandatory pension contributions), Integrated Database for Labour Market Research (IDA): education, hourly wages and firm sector
Key variables
  • Outcome: hourly wage (last week of November)
  • Key variable: job-to-job transitions and unemployment spells
  • Estimated: worker skill and firm productivity types (sorting)
  • Decomposition: log-wage variance into worker heterogeneity, firm heterogeneity, frictions and sorting
Period
1994–2003 (spell data available 1985–2003)
Sample
6,815,884 observations; 782,951 individuals; 1,698,990 job spells; 117,847 firms (NBER 2014 version) Danish workers up to age 55, after labour market entry, never observed in public-sector employment, self-employment, retirement or agriculture. source

Labour markets, wages and sorting

Occupations and Import Competition: Evidence from Denmark

Sharon Traiberman · American Economic Review, 2019 · Individual + firm

Estimates a dynamic occupational choice model on Danish worker histories in which workers accumulate occupation-specific human capital that is lost when they switch. Occupations explain 57 percent of the dispersion in worker outcomes from trade, sectors only 16 percent, and rising import competition from 1995 to 2005 lowered lifetime earnings for about 5 percent of workers.

Data
Integrated Database for Labour Market Research (IDA/IDAS) with ISCO occupation codes, Firm and establishment statistics (FIRE, FIRM) for industry codes, Customs trade data (UHDI), UN Comtrade (CEPII BACI), Danish national accounts, Danish CPI, LIBOR
Key variables
  • Outcome: annual salary income from November employer
  • Choice variable: two-digit occupation by sector
  • Shock: import prices / import competition by industry
  • Worker skill groups: low, medium, high education
  • Occupational tenure
Period
1996–2007 worker panel (tenure built from 1990–1996); import competition 1995–2005
Sample
18,513,301 observations in sample frame (33,502,593 in raw data) Danish individuals aged 23–59 in IDA, 1996–2007, used to estimate an occupational choice model. source

Trade and offshoring Labour markets, wages and sorting

Can Women Have Children and a Career? IV Evidence from IVF Treatments

Petter Lundborg, Erik Plug and Astrid Würtz Rasmussen · American Economic Review, 2017 · Individual

Uses success in in vitro fertilisation treatment among childless Danish women as an instrument for having children, since IVF success is unrelated to labour market history. Children lower women's earnings substantially and persistently, mostly through hourly earnings rather than hours, and the effect is much larger for the first child than for later ones.

Data
IVF register held by the Danish National Board of Health (all IVF treatments in public and private clinics, 1994–2005), Linked administrative registers on education, age, marital status and number of children, Linked labour market registers: labour force status, hours worked, hourly wages, annual earnings, occupation, sector and firm
Key variables
  • Instrument: success of the first IVF treatment
  • Endogenous treatment: having children (fertility at the extensive margin)
  • Outcome: annual earnings
  • Outcome: hourly wages and hours worked / employment
  • Mechanisms: occupation, sector and firm changes
Period
1991–2009 (IVF treatments 1995–2005)
Sample
18,538 treated women Childless women entering their first IVF treatment with embryo implants between 1995 and 2005. source

Gender and the family Family responses and insurance Labour markets, wages and sorting

The Consumption Effects of the 2007–2008 Financial Crisis: Evidence from Households in Denmark

Thais Lærkholm Jensen and Niels Johannesen · American Economic Review, 2017 · Individual

Customers of banks that were hit hard by the crisis cut consumption more than customers of healthier banks. The channel is reduced credit availability: exposed households borrowed less and spent less, which shows how bank distress transmits to the real economy through households.

Data
Tax authority third-party reports of all individuals' loan and deposit account balances, linked to bank identity via branch numbers (Nets lists), Bank balance sheet data from the Danish Central Bank (MFI statistics), Administrative registers on demographics, education, labour market and income, Income and wealth registers (capital income, social transfers, stock portfolios, pension accounts), Motor vehicle register and real estate register
Key variables
  • Treatment: primary bank's 2007 loan-to-deposit ratio (above vs below median exposure)
  • Outcome: individual borrowing (loan balances by account)
  • Outcome: imputed spending = disposable income minus change in net wealth
  • Outcome: car ownership (motor vehicle register)
  • Separate analysis: customers of banks that failed 2008–2011
Period
2003–2011
Sample
around 440,000 individuals, almost 3.5 million individual-years and more than 5.7 million individual-account-years 25% random sample of non-self-employed Danish residents aged 20–50 in 2007 whose primary bank did not fail during 2008–2011. source

Household finance, saving and consumption

Does Growing Up in a High Crime Neighborhood Affect Youth Criminal Behavior?

Anna Piil Damm and Christian Dustmann · American Economic Review, 2014 · Individual

Refugees arriving between 1986 and 1998 were allocated to municipalities quasi-randomly. Boys placed in neighbourhoods with a higher share of youth criminals were later more likely to be convicted, especially for violent crime, which identifies a causal neighbourhood effect on criminal behaviour.

Data
Central Police Register: crime charges and convictions for the full population, Administrative registers: age, residence, parents' IDs, country of origin, immigrant status and date of immigration, Educational Institution Register and surveys, Municipality-level crime and socio-economic measures built from the registers
Key variables
  • Treatment: youth crime conviction rate (share of 15–25-year-olds convicted) in the municipality of assignment
  • Identification: quasi-random assignment of refugee families under the 1986–1998 spatial dispersal policy
  • Outcome: criminal conviction and charge between ages 15 and 21 (by crime type)
  • Longer-term outcomes: education and employment
  • Controls: family background, country of origin, municipality characteristics at assignment
Period
1980–2006
Sample
4,425 children Refugee children from eight source countries who arrived in Denmark before age 15 with at least one refugee parent between 1986 and 1998 and are observed to age 21. source

Migration, neighbourhoods and refugees Crime Children, intergenerational mobility and skills

The Wage Effects of Offshoring: Evidence from Danish Matched Worker-Firm Data

David Hummels, Rasmus Jørgensen, Jakob Munch and Chong Xiang · American Economic Review, 2014 · Individual + firm

Links product-level firm imports and exports to worker wages. Offshoring raises wages of high-skilled workers and lowers wages of low-skilled workers within job spells, while exporting raises wages for all. Tasks that are routine or easily offshored lose the most.

Data
Firm Statistics Register (FirmStat/FIRM), Integrated Database for Labour Market Research (IDA), Firm-worker link (FIDA), Foreign Trade Statistics Register, Extrastat and Intrastat (UHDI), UN COMTRADE world trade data for instruments, Firm accounts and other firm registers (Data Appendix)
Key variables
  • Outcome: log hourly wage of workers within job spells
  • Treatment: firm offshoring (imports of inputs)
  • Treatment: firm exports
  • Instruments: world export supply and world import demand shocks by product and country (COMTRADE) and transport costs
  • Heterogeneity: worker skill type (high vs low skilled)
  • Outcome: earnings losses of displaced workers
Period
1995–2006 (trade data 1990–2006)
Sample
about 1.95 million worker-firm-year and 9,800 firm-year observations Manufacturing workers in Danish firms that both import and export, excluding single-year job spells, workers changing skill level, and firms with fewer than 50 employees and less than 0.6 million DKK in imports. source

Trade and offshoring Labour markets, wages and sorting Firms, ownership and innovation

Migration and Wage Effects of Taxing Top Earners: Evidence from the Foreigners' Tax Scheme in Denmark

Henrik Jacobsen Kleven, Camille Landais, Emmanuel Saez and Esben Schultz · Quarterly Journal of Economics, 2014 · Individual

The 1991 preferential tax scheme for high-earning foreigners roughly doubled the number of highly paid foreigners in Denmark. The implied elasticity of migration with respect to the net-of-tax rate is above one, far larger than domestic labour supply elasticities, and the scheme generated modest wage spillovers.

Data
Administrative tax and payroll records for all residents (income tax register), Civil registration (CPR) citizenship and migration records with dates of entry and exit, Foreigners' tax scheme beneficiary records (contract start and end dates), Employer links at firm and establishment level with industry
Key variables
  • Treatment: eligibility for the preferential foreigners' tax scheme (earnings above threshold)
  • Outcome: number of foreigners above vs below the earnings threshold (migration response)
  • Outcome: earnings of scheme beneficiaries (wage effects / bunching at the threshold)
  • Outcome: spillovers on native top earners' employment and earnings
  • Key variable: citizenship and years of presence in Denmark
Period
1980–2010 (tax data since 1980; scheme introduced 1992)
Sample
Not stated in the sources checked All foreigners and natives resident in Denmark, focusing on foreigners with earnings around the scheme eligibility threshold (researchers excluded). source

Taxation and public finance Migration, neighbourhoods and refugees

Tenure, Experience, Human Capital, and Wages: A Tractable Equilibrium Search Model of Wage Dynamics

Jesper Bagger, François Fontaine, Fabien Postel-Vinay and Jean-Marc Robin · American Economic Review, 2014 · Individual + firm

Builds and estimates an equilibrium search model with on-the-job search and human capital accumulation using Danish career histories. Human capital accumulation drives most early-career wage growth, while job-to-job mobility and employer competition explain the later part of wage profiles.

Data
Weekly labour market spell data built from administrative registers (employment, unemployment, non-participation, self-employment, retirement), Integrated Database for Labour Market Research (IDA): hourly wages, education, experience, ownership, ATP pension contributions used to measure actual experience since 1964, Firm accounts survey (Accounts Statistics) 1999–2003 with value added and hours
Key variables
  • Outcome: hourly wage of jobs active in the last week of November
  • Key variable: job tenure and actual labour market experience
  • Key variable: firm productivity measured by value added (accounting data)
  • Key variable: job-to-job, employment-to-unemployment transitions (spell data)
  • Stratification: three schooling levels (7–11, 12–14, 15–20 years)
Period
1985–2003
Sample
168,649, 320,638 and 66,155 workers (2,534,203, 4,344,288 and 663,362 observations) in the three education groups Danish private-sector male workers born in 1948 or later, at least two years past graduation, with histories truncated at entry into retirement, self-employment, the public sector or industries lacking value-added data. source

Labour markets, wages and sorting

Active vs. Passive Decisions and Crowd-Out in Retirement Savings Accounts: Evidence from Denmark

Raj Chetty, John N. Friedman, Søren Leth-Petersen, Torben Heien Nielsen and Tore Olsen · Quarterly Journal of Economics, 2014 · Individual

Uses the universe of Danish savings records to show that tax subsidies for retirement accounts mostly shift saving between accounts: each krone of subsidy raises total saving by about one øre. Automatic employer contributions, by contrast, raise total saving almost one for one, because roughly 85 percent of individuals are passive savers who do not re-optimise.

Data
Income tax register with third-party reported earnings and pension contributions (IND), Third-party reported wealth: end-of-year assets and liabilities in taxable accounts, Population register (BEF), Integrated Database for Labour Market Research (IDA)
Key variables
  • Outcome: contributions to employer and individual retirement accounts
  • Outcome: taxable saving (change in taxable assets), gross and net
  • Treatment: employer pension contribution changes at job switches (automatic contributions)
  • Treatment: 1999 reduction in tax subsidy for capital pensions for top-bracket taxpayers (price subsidy)
  • Treatment: government mandatory savings plan (SP) contributions
Period
1995–2009
Sample
approximately 41 million observations for 4 million individuals Danish population aged 18–60, excluding observations with self-employment income (unbalanced panel). source

Household finance, saving and consumption Taxation and public finance

Unwilling or Unable to Cheat? Evidence from a Tax Audit Experiment in Denmark

Henrik Jacobsen Kleven, Martin B. Knudsen, Claus Thustrup Kreiner, Søren Pedersen and Emmanuel Saez · Econometrica, 2011 · Individual

A randomised field experiment with the Danish tax authority on about 40,000 taxpayers. Evasion is close to zero for third-party reported income but substantial for self-reported income, and audit threat letters raise reported self-reported income. Information, not morality, is what makes modern tax systems work.

Data
Randomized tax audit experiment implemented by the Danish tax authority (SKAT), SKAT Business Object Database: third-party information reports, pre-populated returns, filed returns and after-audit returns, item by item, SKAT computer-generated audit flags, Basic socio-economic variables and employer industry/size from SKAT records
Key variables
  • Treatment: random assignment to 100% vs 0% unannounced audit group (2007 filing season)
  • Treatment: random threat-of-audit letters (100%, 50%, none) before the 2008 filing deadline
  • Outcome: detected tax evasion (audit adjustments to net income and tax)
  • Outcome: change in reported income in the following year
  • Heterogeneity: self-reported vs third-party reported income
Period
2006–2007 income years (2007 and 2008 filing seasons)
Sample
25,020 employees and 17,764 self-employed Stratified random sample of Danish taxpayers (employees, including transfer recipients, and self-employed) selected by SKAT for the audit experiment. source

Taxation and public finance

Adjustment Costs, Firm Responses, and Micro vs. Macro Labor Supply Elasticities: Evidence from Danish Tax Records

Raj Chetty, John N. Friedman, Tore Olsen and Luigi Pistaferri · Quarterly Journal of Economics, 2011 · Individual + firm

Uses bunching at kinks in the Danish tax schedule to show that observed earnings responses are shaped by search costs and by firms coordinating hours around tax thresholds. Once adjustment frictions are accounted for, the structural labour supply elasticity is around 0.3, far above the small elasticities from individual-level micro studies, which helps reconcile micro and macro estimates.

Data
Income tax register / Income Statistics Register (IND), Population register (BEF), Integrated Database for Labour Market Research (IDA) with firm ID and occupation
Key variables
  • Outcome: bunching (excess mass) of taxable income at the top-tax kink
  • Treatment: marginal tax rate changes at bracket cutoffs (tax simulator)
  • Key variable: firm and occupation-level bunching (hours constraints / firm responses)
  • Key variable: size of tax change across kinks
  • Comparison: wage earners vs self-employed
Period
1994–2001
Sample
17.9 million observations of wage earners (6.8 million within DKr 50,000 of the top tax cutoff; 1.8 million self-employed observations) Danish wage earners aged 15–70, excluding the self-employed and pensioners, with self-employed studied separately. source

Taxation and public finance Labour markets, wages and sorting

Intertemporal Consumption and Credit Constraints: Does Total Expenditure Respond to an Exogenous Shock to Credit?

Søren Leth-Petersen · American Economic Review, 2010 · Individual

The 1992 reform that let Danish homeowners borrow against housing equity provides an exogenous credit shock. Total expenditure responded only modestly on average, with the response concentrated among young households with little liquid wealth, which indicates that credit constraints bind for a minority.

Data
Income tax register: taxable income, transfers, final taxes, Wealth tax register: third-party reported assets and liabilities (housing, shares, mortgage deeds, cash, bonds, debt), Administrative registers on family composition and dwelling characteristics, Danish Family Expenditure Survey (DES) 1994–1996, used to validate the expenditure imputation
Key variables
  • Outcome: total household expenditure imputed from income minus change in wealth
  • Treatment: 1992 credit market reform allowing home equity to be used as collateral for consumption loans
  • Treatment group: homeowners (renters as comparison/consistency check)
  • Credit-constraint proxy: low liquid (non-housing) assets in 1991 relative to monthly disposable income
Period
1987–1996
Sample
38,486 households, of which 25,275 live in owner-occupied housing (working-paper version) Households from a 10% random sample of the Danish population, aged 18–75, not self-employed, non-movers observed in all years 1987–1996. source

Household finance, saving and consumption

An Empirical Model of Growth Through Product Innovation

Rasmus Lentz and Dale T. Mortensen · Econometrica, 2008 · Firm

Estimates a Schumpeterian model of firm growth through product innovation on a Danish firm panel. Reallocation of labour from less to more innovative firms accounts for roughly half of aggregate productivity growth, with the remainder coming from innovation within firms.

Data
Danish Business Statistics Register: annual panel of privately owned firms (value added, total wage bill, full-time equivalent employment)
Key variables
  • Firm value added (Y)
  • Total wage bill (W) used to build quality-adjusted employment
  • Full-time equivalent employment (N)
  • Labor productivity: value added per worker and per quality-adjusted worker
  • Moments: firm growth rates including exit, and productivity growth decomposition (within, between, cross, exit)
Period
1992–1997
Sample
unbalanced panel of 4,872 firms All privately owned Danish firms existing in 1992 with more than 20 workers, followed through 1997, excluding later entrants. source

Firms, ownership and innovation Innovation

Inside the Family Firm: The Role of Families in Succession Decisions and Performance

Morten Bennedsen, Kasper Meisner Nielsen, Francisco Pérez-González and Daniel Wolfenzon · Quarterly Journal of Economics, 2007 · Individual + firm

Uses the gender of a departing CEO's first-born child as an instrument for family succession in Danish firms. Family CEOs hurt performance: operating profitability falls by at least four percentage points relative to firms that hire outside CEOs, with the largest costs in fast-growing industries and large firms.

Data
Købmandsstandens Oplysningsbureau (KOB) firm financial and management data (private, from annual reports), Danish Civil Registration System (CPR) with family links, Danish Commerce and Companies Agency (Erhvervs- og Selskabsstyrelsen) management/board records with CPR numbers, Industry-level data from Statistics Denmark and OECD STAN
Key variables
  • Outcome: operating return on assets (OROA) around CEO transitions
  • Treatment: family CEO succession (incoming CEO related by blood or marriage)
  • Instrument: gender of the departing CEO's firstborn child
  • Heterogeneity: industry growth, skill intensity and firm size
Period
1994–2002 (management data); financial data 1991–2003
Sample
5,334 successions CEO successions in Danish limited liability (public and private) firms between 1994 and 2002, first transition per firm. source

Firms, ownership and innovation Labour markets, wages and sorting

AER: Insights

American Economic Review: Insights, the AER's short-paper journal.

Reskilling and Resilience

Anders Humlum and Pernille Plato · AER: Insights (forthcoming), 2026 · Individual

Studies how retraining shapes workers' resilience to labour market shocks in Danish administrative data, extending the authors' work on human capital investment after injury to the question of which workers reskill and how reskilling protects earnings when jobs disappear.

Data
Work accident reports from Labour Market Insurance (AES), Education Register (UDDA), Integrated Database for Labour Market Research (IDA), National Patient Registry (hospitalizations), Health Insurance Registry (primary care and specialist visits), Prescription Drug Database, Population register (BEF) for partner linkages
Key variables
  • Shock: work accident causing permanent loss of earning capacity
  • Treatment/moderator: access to reskilling (vocational degree granting direct entry to higher education)
  • Outcome: antidepressant use and other mental health measures
  • Outcome: partner labour market and health outcomes
  • Outcome: earnings and employment of injured workers
Period
1995–2017 (work accidents 1998–2017)
Sample
2,915 injury events (male craft workers); 2,103 stable partners Male craft workers with vocational degrees and full-time employment in the three years before a physical work accident causing permanent loss of earning capacity, and their partners. source

Labour markets, wages and sorting Education

Survivors' Mental Health and the Protective Role of Income Stability

Itzik Fadlon, Astrid Sophie Fugleholm and Torben Heien Nielsen · AER: Insights, 2026 · Individual

Documents the immediate, large and lingering rise in mental health medication after a spouse's death across the universe of Danish households. A large share of the spike is explained by the income loss the death imposes, so safety-net liquidity protects survivors' mental health.

Data
Population Registry (BEF) with family linkages, Death Registry, National Patient Registry (LPR), Income Registry (earnings, transfers, pension payouts, capital income), Education Registry, Pharmaceutical Database / prescription register (LMDB), Health Insurance Registry (psychiatrist visits)
Key variables
  • Treatment: spouse's fatal heart attack or stroke (death within 12 months), treated vs later-event control group
  • Outcome: take-up of mental health medication (ATC N05, N06)
  • Mechanism: household income loss from spousal death (instrumented by deceased spouse's earnings share)
  • Heterogeneity: baseline income, net wealth and insurance (DI/OAP, sick pay)
Period
1995–2018
Sample
12,637 treatment and 15,212 control households Danish couples aged 45–80 in which one spouse had a heart attack or stroke between 1999 and 2018 and died within 12 months, excluding the self-employed, balanced four years before and after. source

Health Family responses and insurance Household finance, saving and consumption

Taxing the Wealth of the Poor: Evidence from the Danish Old-Age Support Asset Test

Niels Johannesen, Johan Sæverud and Emmanuel Saez · AER: Insights, 2026 · Individual

The asset test for Danish old-age support creates diffuse but large excess mass in liquid assets just below the threshold among the eligible, relative to comparable ineligible groups. Cohort analysis suggests the test reduces liquid assets by about 20 percent near the threshold, and high-frequency bank data show the responses are permanent rather than timed around the test date.

Data
Administrative registers on assets, income and demographics (Statistics Denmark): third-party reported and self-reported liquid wealth, Danske Bank customer data: monthly spending, cash withdrawals and account balances (2014–2016)
Key variables
  • Running variable: liquid wealth relative to the old-age check asset test threshold
  • Outcome: bunching / excess mass of liquid wealth below the threshold
  • Outcome: year-end spending and cash withdrawals (bank data)
  • Eligibility: age 65+ and low income
Period
2014–2018 (main cross-section); bank data 2014–2016
Sample
2,526,421 observations of singles aged 60+ (2,054,987 aged 65+; 1,283,721 low-income 65+), pooled 2014–2018; bank sample 461,471 observations, 2014–2016 Single individuals aged 60 and over in Denmark, with a linked Danske Bank subsample of about 20 percent of the elderly population. source

Taxation and public finance Household finance, saving and consumption

Dynamic Spending Responses to Wealth Shocks: Evidence from Quasi Lotteries on the Stock Market

Asger Lau Andersen, Niels Johannesen and Adam Sheridan · AER: Insights, 2024 · Individual

Uses lottery-like variation in stock market gains across investors with similar portfolios, observed in granular bank data, to trace spending responses. Responses are immediate and persistent, cumulating to a marginal propensity to consume of 4.4 percent over one year and 16 percent over three, consistent with the permanent income hypothesis with some inattention.

Data
Danske Bank customer records: transaction-level spending, securities portfolios and online logins (2009–2016), Population register (household identifiers, age), Tax register: income and banks' year-end account-level reports, Employment register (employer links), Education register
Key variables
  • Treatment: monthly stock market gains, with quasi-random variation across investors with similar portfolio characteristics
  • Outcome: monthly household consumer spending (card, bill, mobile payments, cash withdrawals)
  • Heterogeneity: liquidity
  • Heterogeneity: financial attention (frequency of account logins)
Period
2009–2016
Sample
around 13.5 million household-month observations comprising 390,000 distinct households Danske Bank households with stock portfolios of at least 100 DKK and at least five spending transactions per month, excluding employee-shareholders and holders of only Danske Bank shares. source

Household finance, saving and consumption

Does Biology Drive Child Penalties? Evidence from Biological and Adoptive Families

Henrik Kleven, Camille Landais and Jakob Egholt Søgaard · AER: Insights, 2021 · Individual

Compares event-study child penalties for biological and adoptive mothers using almost 40 years of Danish adoption data. Short-run penalties are slightly larger for biological mothers, but long-run penalties are virtually identical, so biology is not a key driver of child-related gender gaps.

Data
Statistics Denmark administrative registers covering the full population 1980–2017, linked with family identifiers, Adoption registry of Statistics Denmark (1988–2009), augmented with foreign adoptions identified via country of origin and Central Person Register immigration records, Earnings and labour-supply registers incl. hours from the ATP mandated pension scheme, Education registers
Key variables
  • Event: arrival of first child (by birth or adoption)
  • Outcome: annual earnings (wages, salaries, self-employment)
  • Outcome: labour force participation, hours worked, wage rates
  • Comparison group: biological vs adoptive families (biological sample reweighted to match adoptive families)
Period
1980–2017
Sample
around 527,000 first births (biological sample) and around 4,600 first arrivals (adoptive sample) Danish parents whose first child arrived by birth or foreign adoption (before age 5) between 1985 and 2007, with both parents known, alive and resident in Denmark from 5 years before to 10 years after. source

Gender and the family Family responses and insurance Labour markets, wages and sorting

The Welfare Magnet Hypothesis: Evidence from an Immigrant Welfare Scheme in Denmark

Ole Agersnap, Amalie Sofie Jensen and Henrik Kleven · AER: Insights, 2020 · Individual

The 2002 cut in benefits for non-EU immigrants, its repeal and its reintroduction provide repeated quasi-experiments on the welfare magnet hypothesis. The cut reduced net immigration by about 5,000 people a year and the repeal reversed it almost exactly, implying a migration elasticity with respect to benefits of 1.3.

Data
Danish administrative registers on the full population 1980–2017 (immigrant status, country of origin, demographics, family links), Residence permit data by permit type (asylum, family, work/study; available from 1997), Central Person Register (CPR) migration records, National statistics bureaus of other Nordic countries and OECD International Migration Database (1991–2017)
Key variables
  • Treatment: maximum monthly welfare benefit for non-EU immigrants (2002 introduction, 2012 repeal, 2015 reintroduction of the immigrant welfare scheme)
  • Outcome: net immigration flow by welfare benefit group, scaled by pre-scheme stock
  • Outcome: gross inflow by residence permit type
  • Comparison: EU vs non-EU immigrants; Denmark vs other Nordic countries
Period
1980–2017
Sample
444 group-year observations (12 welfare benefit groups) Immigrant flows to Denmark aged at least 30 (baseline), collapsed into 12 benefit-eligibility groups by EU/non-EU origin, marital status and number of children. source

Migration, neighbourhoods and refugees Taxation and public finance

American Economic Journals

American Economic Journal: Applied Economics, Economic Policy and Macroeconomics.

Breaking Bad: How Health Shocks Prompt Crime

Steffen Andersen, Elin Colmsjö, Gianpaolo Parise and Kim Peijnenburg · AEJ: Applied Economics, 2026 · Individual

Uses plausibly exogenous timing of cancer diagnoses in Danish registers to show that a health shock raises the probability of committing a crime, both first offences and re-offences, persistently. Patients replace lost legal income with illegal income and face a lower expected cost of punishment because of reduced survival, and welfare programmes that cushion the income loss dampen the effect.

Data
Danish administrative registers on cancer diagnoses (timing of diagnosis), Crime registers (first crimes and re-offenses), Income and welfare program registers
Key variables
  • Treatment: timing of a cancer diagnosis (health shock)
  • Outcome: probability of committing a crime (first crimes and re-offenses)
  • Mechanism: loss of legal income
  • Mechanism: survival probability (expected cost of punishment)
  • Heterogeneity: welfare program coverage
Period
Not stated in the sources checked
Sample
Not stated in the sources checked Danish individuals diagnosed with cancer, using variation in the timing of diagnosis. source (abstract)

Health Crime Household finance, saving and consumption

Healthy at Work? Evidence from a Social Experimental Evaluation of a Firm-Based Wellness Program

Marianne Simonsen and Lars Skipper · AEJ: Economic Policy, 2025 · Individual + firm

A large social experiment across worksites, followed for up to twelve years in the registers, evaluates an employer-sponsored health programme. Employees at treated worksites see fewer GP visits and buy fewer prescription drugs for up to seven years, with no change in hospitalisations, absence or turnover and some spillovers within the family.

Data
Healthy-at-Work randomised experiment records (work-unit assignment, September 2008), Primary care physician consultation records (Statistics Denmark registers), Prescription drug purchase records, Hospital contact / hospitalisation records, Employment, sickness absence and turnover registers, Socio-economic background registers
Key variables
  • Treatment: work-unit randomised to the Healthy-at-Work wellness program
  • Outcome: primary care physician visits
  • Outcome: prescription drug purchases (any, months supply)
  • Outcome: hospitalisations (somatic, psychiatric)
  • Outcome: sickness absence and turnover
  • Spillover outcome: spouses' health care use
Period
Randomisation 2008; follow-up to 2020 (PCP visits and work outcomes), 2019 (prescriptions), 2018 (hospitalisations)
Sample
7,541 workers (3,735 treatment, 3,806 control) in 314 work-units Elderly-care health workers in 314 work-units of 110 employers across 11 Danish municipalities enrolled in the Healthy-at-Work experiment. source

Health Labour markets, wages and sorting Firms, ownership and innovation

Background Matters, but Not Whether Parents Are Immigrants: Outcomes of Children Born in Denmark

Mathias Fjællegaard Jensen and Alan Manning · AEJ: Applied Economics, 2025 · Individual

Children born in Denmark to immigrant parents have lower earnings, more unemployment, less education, more transfers and more convictions than children of Danish-born parents. Conditional on parental socioeconomic characteristics, however, they do as well or slightly better, so the gaps reflect deprived backgrounds rather than immigrant parentage.

Data
Danish register data linking children to parents (Statistics Denmark, 1980–2017), Income and earnings registers (annual labour income incl. self-employment, transfers), Monthly employment register (hours, hourly wages, from 2008), Education registers (incl. survey-based registration of foreign education of immigrants), Criminal justice registers (convictions, prison sentences, dropped charges / not-guilty verdicts), Occupation codes (ISCO88)
Key variables
  • Group: number of parents born outside Denmark (0, 1, 2; Greenland/Faroe Islands)
  • Outcome: earnings and unemployment at age 30
  • Outcome: public transfers, completed education by age 30
  • Outcome: criminal convictions, prison sentences, dropped charges
  • Controls: parental income, unemployment years, occupation and education during childhood
Period
1980–2017
Sample
396,417 children (Table 1 total); 362,460 with two Danish-born parents, 10,399 with two immigrant parents, 20,908 with one immigrant parent, 2,650 with a parent from Greenland/Faroe Islands All children born in Denmark 1980–1987 with both parents known, followed to age 30. source

Migration, neighbourhoods and refugees Children, intergenerational mobility and skills Inequality and fairness

Do Medical Treatments Work for Work? Evidence from Breast Cancer Patients

N. Meltem Daysal, William N. Evans, Mikkel Hasse Pedersen and Mircea Trandafir · AEJ: Economic Policy, 2025 · Individual

A Danish guideline change shifted which breast cancer patients received radiation therapy, giving quasi-experimental variation in treatment. Radiotherapy reproduces the survival gains found in trials and has economic returns: ten years after diagnosis it raises employment by 37 percent and earnings by 45 percent, undoing most of the post-diagnosis employment drop.

Data
Danish Breast Cancer Cooperative Group (DBCG) clinical Breast Cancer Database, Register of Causes of Death, Register-Based Labour Force Statistics (RAS), Income Statistics Register, DREAM weekly transfer register, Population Register (BEF), Education Register
Key variables
  • Treatment: receipt of radiotherapy
  • Instrument: January 1995 DBCG guideline change expanding radiotherapy eligibility (diagnosed after 1995 x eligible group)
  • Outcome: all-cause and breast cancer mortality
  • Outcome: employment, annual labour earnings, gross income
  • Outcome: sickness and disability benefit receipt
Period
1990–2008 (diagnoses 1990–1998)
Sample
2,823 observations (women) High-risk pre-menopausal women under 55 diagnosed with breast cancer in Denmark 1990–1998 and enrolled in the DBCG89 clinical trial. source

Health Labour markets, wages and sorting

Attendance Boundary Policies and the Limits to Combating School Segregation

Andreas Bjerre-Nielsen and Mikkel Høst Gandil · AEJ: Economic Policy, 2024 · Individual

Uses address-level data on the universe of Danish children and changes in school attendance boundaries over time. Households defy reassignment to schools with lower socioeconomic status, resourceful households most of all, so redrawing boundaries toward highly disadvantaged schools barely changes those schools' composition.

Data
Register data on the universe of Danish children (Statistics Denmark), School attendance boundary data with boundary changes over time
Key variables
  • Treatment: reassignment of a residential area to a different school by an attendance boundary change
  • Outcome: enrolment in (or defiance of) the assigned school
  • Heterogeneity: household socioeconomic resources
  • Socioeconomic composition of the new school's students
Period
Not stated in the sources checked
Sample
Not stated in the sources checked Danish children (universe) whose residential areas were affected by changes in school attendance boundaries. source (abstract)

Education Children, intergenerational mobility and skills Inequality and fairness

Refugee Benefit Cuts

Christian Dustmann, Rasmus Landersø and Lars Højsgaard Andersen · AEJ: Economic Policy, 2024 · Individual

A 2002 reform cut welfare benefits for newly arrived refugees by roughly half. Employment rose modestly in the short run and then faded, while disposable income fell sharply. The cut raised crime among adults and harmed children's school enrolment and outcomes.

Data
Danish Immigration Service residence permit records, Income register from tax authority records (earnings, transfers, taxes), Hourly wage and occupation data, Labour market register (employment status), Population register (BEF), Crime registers: police and court records of charges and convictions, Job openings data from Jobindex.dk
Key variables
  • Treatment: residency granted after the July 2002 Start Aid benefit cut
  • Running variable: date residency was granted relative to the reform
  • Outcome: employment, labour earnings, transfer and disposable income
  • Outcome: crime convictions (property crime)
  • Heterogeneity: local labour demand in assignment municipality (low-skill job openings per unemployed)
Period
Residency granted 2001–2003; outcomes up to 10 years after residency
Sample
4,843 individuals Refugees and family-reunified refugees granted residency in Denmark between January 2001 and December 2003 aged 18–55, excluding Afghans, former Yugoslavs and re-migrants. source

Migration, neighbourhoods and refugees Crime Children, intergenerational mobility and skills

Unintended Consequences of Welfare Cuts on Children and Adolescents

Christian Dustmann, Rasmus Landersø and Lars Højsgaard Andersen · AEJ: Applied Economics, 2024 · Individual

The 2002 benefit cut for newly arrived refugees reduced family disposable income by 30 percent over five years. Children exposed at preschool or school age obtained lower grades, less education and lower adult earnings, and teenagers at exposure saw large increases in convictions for violent and property crime.

Data
Danish Immigration Service residence permit records, Historical Migrations database, Income register from tax authority records, Register on Completed Education, Daycare register, 9th-grade exam grades, 6th-grade national language test scores and school well-being survey (Ministry of Education), Crime registers: police and court records
Key variables
  • Treatment: parents granted residency after the 2002 Start Aid welfare cut
  • Running variable: residency date relative to the reform
  • Outcome: 9th-grade GPA, 6th-grade language test scores, completed education
  • Outcome: adult earnings and employment
  • Outcome: criminal convictions
Period
Residency granted January 2001–December 2003; income data through 2019
Sample
6,888 individuals (3,406 adults aged 18–45 with children and 3,482 children aged 0–18) Refugee families with children granted residency in Denmark within 18 months of the 2002 reform, excluding Afghans, former Yugoslavs and emigrants. source

Migration, neighbourhoods and refugees Children, intergenerational mobility and skills Crime Education

Public Pensions and Private Savings

Esteban García-Miralles and Jonathan M. Leganza · AEJ: Economic Policy, 2024 · Individual

A Danish reform raising the social security eligibility age, studied with a regression discontinuity in administrative data, increased contributions to personal and employer pension accounts when later eligibility kept people working longer. Inertia in previous savings behaviour and firms' default contribution rates are the key mechanisms.

Data
Population registers (date of birth, demographics), Labour-market and income/asset registers (tax-reported bank and stock balances, property values, pension contributions), Monthly earnings register (eIncome / eIndkomst), Voluntary early retirement pension (VERP) contribution and benefit records
Key variables
  • Running variable: birth date relative to 1 January 1954 cutoff
  • Treatment: higher pension eligibility ages from 2011 reform
  • Outcome: contributions to employer-sponsored and personal retirement accounts
  • Outcome: changes in bank and stock account balances and property values
  • Outcome: pre-tax earnings and monthly retirement age
Period
1985–2018 (annual); 2008–2017 (monthly)
Sample
40,042 individuals (analysis sample); 12,020 individuals (RD estimation sample) Non-self-employed Danes born within six months of 1 January 1954 who regularly contributed to the VERP early retirement scheme before the reform. source

Household finance, saving and consumption Taxation and public finance Labour markets, wages and sorting

The Gender Application Gap: Do Men and Women Apply for the Same Jobs?

Jonas Fluchtmann, Anita M. Glenny, Nikolaj A. Harmon and Jonas Maibom · AEJ: Economic Policy, 2024 · Individual

Uses administrative records of the job applications made by every Danish unemployment insurance recipient. Men and women apply to very different job types even when observationally similar, and these differences in applications account for more than 70 percent of the residual gender wage gap.

Data
Joblog job application records from the public employment service platform (Jobnet), Unemployment insurance payment records / DREAM event-history data, Integrated Database for Labour Market Research (IDA), Employment Statistics for Employees, monthly earnings and hours (BFL)
Key variables
  • Outcome: characteristics of applied-for jobs (occupation, industry, AKM firm wage premium, commute, hours)
  • Group: gender
  • Outcome: hourly wage in new job one month after hire
  • Predicted 'typical wage' of applied-for jobs
Period
September 2015–September 2017
Sample
105,879 individuals, 114,375 UI spells, 2,911,585 job applications Danish UI recipients entering new spells from September 2015 to September 2017 lasting at least 8 weeks, with at least 4 registered applications and finding a job within one year. source

Gender and the family Labour markets, wages and sorting

Credit Supply Shocks and Prices: Evidence from Danish Firms

Tobias Renkin and Gabriel Züllig · AEJ: Macroeconomics, 2024 · Firm

Combines loan-level data on Danish firm–bank relationships with survey producer prices and export unit values. Firms whose banks were exposed to the global financial crisis saw loans fall and rates rise, and they raised output prices by 3 to 5 percent to generate cash, with smaller increases where demand is more elastic.

Data
Bank account-level loan and deposit reports to the Danish Tax Authority (firm part), Bank balance sheets from the Danish FSA (Finanstilsynet) and Danmarks Nationalbank monetary and financial statistics, Producer Price Index survey microdata, Customs export data for export unit values, Firm register, Accounting statistics (regnskabsstatistik) and VAT sales data
Key variables
  • Treatment: firm exposure to banks with high pre-crisis loan-to-deposit ratios
  • Outcome: producer prices (PPI) and export unit values
  • Intermediate outcome: firm bank loans and average interest rate
  • Heterogeneity: product demand elasticity
Period
2005–2010
Sample
1,753 firms (213 linked to the PPI survey, 1,176 to export data) Danish manufacturing firms active 2005–2010 with at least ten employees and an active bank lending relationship in 2007. source

Firms, ownership and innovation Macroeconomics and expectations

How Do Households Respond to Job Loss? Lessons from Multiple High-Frequency Datasets

Asger Lau Andersen, Amalie Sofie Jensen, Niels Johannesen, Claus Thustrup Kreiner, Søren Leth-Petersen and Adam Sheridan · AEJ: Applied Economics, 2023 · Individual

Combines bank transaction data with government registers to measure every margin of self-insurance after job loss. Over two years households cut spending by 30 percent of the income loss and cover about half of it by running down liquid balances; spousal labour supply, private transfers, home equity extraction and consumer credit contribute less.

Data
Danske Bank customer transaction and account records (spending, income inflows, balances, loans), Monthly payroll and income transfer records (BFL/eIndkomst) from the Danish Tax Agency, Population register (BEF) household structure and spouse links, End-of-year account-level bank loan and deposit records from the Danish Tax Agency, Loan-level mortgage data from mortgage banks (via Statistics Denmark), Mass layoff notifications to the Danish Agency for Labour Market and Recruitment, Annual income and wealth, education, home ownership and occupation registers
Key variables
  • Treatment: job loss event (main employer wage payments cease, followed by unemployment benefits)
  • Outcome: household spending (card, mobile, bills, ATM withdrawals)
  • Outcome: net saving in liquid assets, non-mortgage debt repayment, mortgage refinancing and equity extraction
  • Outcome: spousal labour income, private transfers, government transfers
  • Design: monthly event study from 18 months before to 24 months after job loss
  • Subsample: involuntary job loss from mass layoffs
Period
January 2009–December 2016 (job losses July 2010–December 2015)
Sample
10,002 individuals (baseline sample of active bank customers); gross sample of 66,844 job losers Danish individuals born 1950–1979 who lost their job between July 2010 and December 2015 after at least 18 months of stable earnings, in stable households that are active customers of Danske Bank. source

Household finance, saving and consumption Labour markets, wages and sorting

Consumption Heterogeneity: Micro Drivers and Macro Implications

Edmund Crawley and Andreas Kuchler · AEJ: Macroeconomics, 2023 · Individual

Estimates marginal propensities to consume across Danish households with a method that corrects biases in earlier register-based estimates. Liquid wealth is the dominant predictor of MPCs, and the estimated heterogeneity is used to quantify monetary policy transmission in Denmark and the United States.

Data
Tax-authority income records (household after-tax and transfer income), Tax-reported wealth data: bank deposits, loans, bond and stock holdings, mortgages (year-end balances), Private pension contribution records, Civil Registration System (CPR) family/household links, Mortgage reset data (amount resetting over the following year)
Key variables
  • Outcome: imputed household expenditure (income minus pension contributions minus change in non-housing net worth)
  • Shock: unexpected (residual) change in after-tax household income of the head
  • Heterogeneity: liquid wealth (bank deposits) quintiles
  • Heterogeneity: Unhedged Interest Rate Exposure (URE) and Net Nominal Position (NNP)
Period
2003–2015
Sample
7.7 million observations from 2004 to 2015 Danish households headed by an individual aged 30–55 in 2008, excluding business owners, households with housing transactions, and top/bottom 1% of income and income changes. source

Macroeconomics and expectations Household finance, saving and consumption

The Effects of DNA Databases on the Deterrence and Detection of Offenders

Anne Sofie Tegner Anker, Jennifer L. Doleac and Rasmus Landersø · AEJ: Applied Economics, 2021 · Individual

A large expansion of Denmark's DNA database cut recidivism within a year by up to 42 percent and raised the chance that re-offenders are caught, implying that a 1 percent higher detection probability lowers crime by more than 2 percent. Registered offenders also became more likely to work, study and live in stable families.

Data
Central Charge Register (crime date, charge date, crime type), Danish Central DNA Database person-specific section (DNA registration records), Conviction records (crime registers), Full-population registers on demographics, labour market and family links
Key variables
  • Treatment: offender registered in the DNA database
  • Instrument: charged after the May 2005 DNA database expansion (donut RD, excluding June–September 2005)
  • Running variable: months before May / after October 2005
  • Outcome: convictions within one, two and three years after the charge (all crime and by type)
  • Detection vs. deterrence: split by charges filed more vs. less than three weeks after the crime
  • Secondary outcomes: employment, education, marriage
Period
Charges June 2003–September 2007 (excluding June–September 2005), with follow-up outcomes
Sample
38,674 individuals with 66,911 charge observations Danish-resident males aged 18–30 charged with Penal Code or Weapons Act offenses who had at most 10 previous charges. source

Crime

Family Labor Supply Responses to Severe Health Shocks: Evidence from Danish Administrative Records

Itzik Fadlon and Torben Heien Nielsen · AEJ: Applied Economics, 2021 · Individual

Compares households hit by a fatal versus a non-fatal health shock at the same time. After a spouse's death the surviving spouse raises labour supply to self-insure, while after a non-fatal shock spouses reduce labour supply to care for the patient. Children of the household adjust less.

Data
Cause of Death Registry, National Patient Registry (LPR) hospitalisation records with ICD diagnoses, Income and transfer registers (earnings, government transfers, pension and annuity payouts, capital income), 1980–2011, Third-party reported liquid wealth balances, 1984–2011, Integrated Database for Labour Market Research (IDA), incl. ATP-based full-/part-time employment, Household linkages of spouses and cohabiting partners (population registers)
Key variables
  • Treatment: spousal death (fatal health shock) or first non-fatal heart attack/stroke
  • Control group: households experiencing the same shock a few years later
  • Outcome: surviving/healthy spouse's labour force participation and earnings
  • Outcome: household income from transfers, pensions and insurance; liquid wealth
  • Heterogeneity: household liquidity, income loss, age
Period
1980–2011 (shocks 1985–2011)
Sample
310,720 treated and 409,190 control households (fatal shocks); 37,437 treated and 54,887 control households (non-fatal heart attacks and strokes) Danish married and cohabiting couples with both spouses aged 45–80 in the year of the (actual or placebo) shock; the non-fatal shock sample is limited to spouses under 60 surviving at least three years. source

Health Family responses and insurance Labour markets, wages and sorting

Do People Respond to the Mortgage Interest Deduction? Quasi-Experimental Evidence from Denmark

Jonathan Gruber, Amalie Sofie Jensen and Henrik Kleven · AEJ: Economic Policy, 2021 · Individual

A major reform that scaled back the mortgage interest deduction for middle- and high-income households had a precisely estimated zero effect on home ownership. It did reduce the size and price of houses bought, lowered household indebtedness and pushed down equilibrium house prices.

Data
Income tax records (incomes, taxes, deductible interest expenses), Housing register (homeownership, property characteristics, home size), Tax authority property value appraisals (for imputed rent and wealth tax), Population registers with spouse/cohabitant and child links
Key variables
  • Policy: 1987 tax reform reducing the value of the mortgage interest deduction for top-rate taxpayers
  • Treatment: top-bracket taxpayers vs. below-top/middle/bottom groups (difference-in-differences)
  • Outcome: homeownership
  • Outcome: home size (square metres) and home value
  • Outcome: total deductible interest expenses (debt)
  • Elasticity with respect to the net-of-tax rate (1−τ)
Period
1980–2011 (main panel 1980–1996)
Sample
about 40 million individual-year observations; 34,440,869 observations in the main homeownership regression (below-top controls) Semi-balanced panel of Danish individuals aged 20–80 observed in every year 1980–1996, excluding children living with parents. source

Taxation and public finance Housing Household finance, saving and consumption

What Is the Added Value of Preschool for Poor Children? Long-Term and Intergenerational Impacts and Interactions with an Infant Health Intervention

Maya Rossin-Slater and Miriam Wüst · AEJ: Applied Economics, 2020 · Individual

Access to preschool targeted at low-income children between 1933 and 1960 raised adult education, earnings and survival past 65, and the children of exposed women obtained more education by 25. Exposure to the nurse home visiting programme in infancy reduces preschool's added value, so the two programmes are partial substitutes.

Data
Archival data on all approved Danish preschools 1933–1960 (establishment and approval year, slots), Nurse Home Visiting program implementation dates by municipality, Statistical Commune Data Archive (elections and censuses) for municipality controls, Municipal live births and infant deaths, DigDag historical administrative geography (parish-municipality mapping), Administrative population register data 1980–2012 (education, earnings, survival, hospital admissions, diagnoses), Mother-child links (Danish Civil Registration System)
Key variables
  • Treatment: approved preschool in municipality of birth at age 3
  • Interaction: exposure to the infant Nurse Home Visiting program
  • Outcome: education and earnings around age 50
  • Outcome: survival past age 65, hospital admissions, diagnoses
  • Intergenerational outcome: oldest child's educational attainment by age 25
  • Controls: municipality and birth-year fixed effects, county-by-year trends, municipality characteristics
Period
Cohorts born 1930–1957; outcomes 1980–2012; children born 1955–1987
Sample
1,640,214 observations (Danish-born with valid parish codes); 880,708 observations in municipalities with an approved preschool by 1960, collapsed to 3,862 municipality × birth-year cells Danish-born individuals born 1930–1957 with a valid parish of birth who are observed after 1980, focusing on the 138 municipalities that ever had an approved preschool. source

Education Children, intergenerational mobility and skills Health

Liquidity Constraint Tightness and Consumer Responses to Fiscal Stimulus Policy

Claus Thustrup Kreiner, David Dreyer Lassen and Søren Leth-Petersen · AEJ: Economic Policy, 2019 · Individual

The 2009 payout of Special Pension savings worked as a fiscal stimulus. Measuring constraint tightness by the marginal interest rate households pay, the spending response is highest for households facing high marginal rates and otherwise small, which supports targeting stimulus at the credit constrained.

Data
Telephone survey of SP account holders on spending of the 2009 SP payout (Epinion, January 2010), ATP register of Special Pension (SP) savings accounts (balances on 1 May 2009), Income tax register with incomes, assets and liabilities, 1998–2009, Account-level deposit and loan records with interest payments from the Danish Tax Agency (SKAT), 2007–2009, Demographic registers (Statistics Denmark)
Key variables
  • Outcome: self-reported share of the SP payout spent
  • Key regressor: household marginal interest rate in 2008 (from account-level loan and deposit data)
  • Policy: 2009 early release of Special Pension (SP) savings
  • Controls: payout size, income, liquid wealth, demographics
  • Validation: register-based measures of net savings and pension savings
Period
1998–2009 registers; account-level data 2007–2009; survey January 2010
Sample
5,037 completed interviews with respondents who took out the SP balance Random sample of Danish Special Pension account holders who withdrew their SP savings in 2009, linked to administrative registers. source

Household finance, saving and consumption Taxation and public finance

Children and Gender Inequality: Evidence from Denmark

Henrik Kleven, Camille Landais and Jakob Egholt Søgaard · AEJ: Applied Economics, 2019 · Individual

Event studies around the birth of the first child show mothers' earnings fall about 20 percent relative to fathers' in the long run, through hours, participation and wage rates. These child penalties now account for most of the remaining gender earnings gap and are transmitted across generations through mothers' own upbringing.

Data
Full-population Danish administrative registers linked by personal ID (earnings, labour supply, occupation, firm, education), 1980–2013, Family and generational links (population register), ATP pension contributions as third-party measure of hours worked, Additional administrative data back to 1964 for intergenerational analysis, Matched employer-employee data (firm family-friendliness), International Social Survey Program (ISSP) 2002 for gender attitudes
Key variables
  • Treatment/event: birth of first child (event time relative to first birth)
  • Outcome: earnings, labour force participation, hours worked (ATP), wage rates
  • Outcome: occupation rank, sector, firm family-friendliness
  • Child penalty: percentage drop of women's relative to men's earnings
  • Intergenerational: maternal grandparents' labour supply
Period
1980–2013 (with data back to 1964 for intergenerational transmission); first births 1985–2003
Sample
around 470,000 births or 15,040,000 individual-year observations Danish parents with a first child born 1985–2003 who are observed alive and resident in Denmark from 5 years before to 10 years after the birth. source

Gender and the family Family responses and insurance Labour markets, wages and sorting

The Effect of Export Promotion on Firm-Level Performance

Jakob Munch and Georg Schaur · AEJ: Economic Policy, 2018 · Firm

Evaluates the Danish Trade Council's export promotion services, separating firms that sought help from firms the council approached on observables. Promotion raises sales, value added, employment and value added per worker, and for small firms the gain in value added is roughly three times the direct cost.

Data
Danish Trade Council data on export promotion services (self-selected vs. Council-approached firms), Danish firm-level performance data (sales, value added, employment); specific registers not stated in abstract
Key variables
  • Treatment: firm receives export promotion services from the Danish Trade Council
  • Comparison: firms that self-selected into services vs. firms approached by the Trade Council
  • Outcome: sales, value added, employment, value added per worker
  • Controls: extensive set of firm characteristics (selection on observables)
Period
Not stated in the sources checked
Sample
Not stated in the sources checked Danish firms, comparing users of Trade Council export promotion services with comparable non-users. source (abstract)

Trade and offshoring Firms, ownership and innovation

Universal Investment in Infants and Long-Run Health: Evidence from Denmark's 1937 Home Visiting Program

Jonas Hjort, Mikkel Sølvsten and Miriam Wüst · AEJ: Applied Economics, 2017 · Individual

Uses the staggered municipal roll-out of the 1937 universal infant home visiting programme and follows treated cohorts into middle age in the registers. Treated individuals have higher survival between ages 45 and 64, fewer hospital nights and less cardiovascular disease, consistent with early nutrition and disease environment programming adult health.

Data
Archival records of home visiting program implementation dates by municipality, 1937–1949 (Danish National Archives), Danish Commune Archive / Statistical Commune Data Archive (pre-1937 municipal characteristics from censuses and elections), Medical Reports for the Kingdom of Denmark (1936 infant mortality by medical district), Administrative population data with date and parish of birth (cohorts 1935–1949), Danish Inpatient Register / National Patient Register (LPR), 1980–2012, Danish Death Register (cause of death), 1980–2012, DigDag historical administrative geography
Key variables
  • Treatment: born in a municipality after it implemented the home visiting program
  • Variation: staggered municipal implementation timing 1937–1949
  • Outcome: age-specific survival rates, ages 46–64
  • Outcome: hospital nights between ages 45–64
  • Outcome: diagnoses of heart disease, cardiovascular disease, diabetes, cancer; cause of death
  • Controls: municipality and cohort fixed effects, pre-1937 municipal characteristics
Period
Birth cohorts 1935–1949; outcomes 1980–2012
Sample
876,912 individuals, collapsed to 20,078 municipality × birth cohort × treatment-status cells Danish-born individuals born 1935–1949 outside hospitals who survived and lived in Denmark to age 45, matched to birth municipality. source

Health Children, intergenerational mobility and skills

Tax Reforms and Intertemporal Shifting of Wage Income: Evidence from Danish Monthly Payroll Records

Claus Thustrup Kreiner, Søren Leth-Petersen and Peer Ebbesen Skov · AEJ: Economic Policy, 2016 · Individual + firm

The 2010 cut in the top marginal tax rate was announced in advance, and monthly payroll data show top earners shifting wage income from December 2009 into January 2010. Shifting is concentrated among managers and employees of small firms, and it inflates short-run elasticity estimates.

Data
Monthly payroll records (eIndkomst / eIncome register) from the tax agency SKAT, Background registers on individuals and firms at Statistics Denmark (incl. firm size, liquid assets), Telephone survey on awareness of income-shifting opportunity (January 2011), merged to eIncome register
Key variables
  • Outcome: percentage change in monthly gross wage relative to 2008 average
  • Treatment: private-sector employees with 2008 monthly earnings above DKK 35,000 (top-tax incentive from 2010 reform)
  • Control group: monthly earnings DKK 30,000–35,000
  • Heterogeneity: firm size, liquid assets, earnings percentile
  • Elasticity of taxable income with and without shifting component
Period
January 2008–December 2011 (monthly)
Sample
328,679 individuals, of which 219,179 in the treatment group; survey sample of 878 taxpayers Private-sector employees with a wage record in every month of 2008 and positive income in all years, earning above DKK 30,000 per month in 2008. source

Taxation and public finance Labour markets, wages and sorting

Do Employer Pension Contributions Reflect Employee Preferences? Evidence from a Retirement Savings Reform in Denmark

Itzik Fadlon, Jessica Laird and Torben Heien Nielsen · AEJ: Applied Economics, 2016 · Individual + firm

A reform that cut the subsidy to capital pension accounts for top-bracket workers led employers to reduce contributions to those accounts immediately, by more the larger the share of affected employees, and to shift the money to annuity accounts. Employer contributions track employees' savings preferences.

Data
Income tax register (incl. third-party reported pension contributions), Population register (BEF), Integrated Database for Labour Market Research (IDA)
Key variables
  • Outcome: employer contribution rate to capital and annuity pension accounts (median within workplace)
  • Treatment: share of workplace employees above the top income tax threshold
  • Policy variation: 1999 reform cutting the deduction for capital pension contributions for top-bracket taxpayers
  • Unit: workplace = 2-digit occupation × firm cell
  • Comparison: individual private (IRA-type) pension contributions
Period
1996–2001
Sample
2,020,705 worker-year observations; 84,764 workplace-year observations (26,775 unique workplaces) Private-sector white-collar wage earners aged 20–60 without self-employment income, in occupation-firm cells with at least five employees. source

Household finance, saving and consumption Taxation and public finance Firms, ownership and innovation

Immigrants' Effect on Native Workers: New Analysis on Longitudinal Data

Mette Foged and Giovanni Peri · AEJ: Applied Economics, 2016 · Individual

Refugee-country immigration into Danish municipalities from 1991 to 2008 pushed less-educated native workers toward more complex, less manual occupations. Native wages and employment rose rather than fell, and effects were positive even for low-skilled natives who moved across firms.

Data
Integrated Database for Labour Market Research (IDA), Occupation codes linked to O*NET task intensities (manual, communication, cognitive), Full population registers for municipality immigrant shares, Refugee spatial dispersal policy 1986–1998 (initial refugee allocation by municipality)
Key variables
  • Treatment: share of refugee-country immigrants in the municipality of work
  • Instrument: immigrant inflow predicted from the 1986–1998 refugee dispersal policy
  • Outcome: occupational complexity index (O*NET-based)
  • Outcome: log hourly wage (incl. mandatory pension contributions)
  • Outcome: fraction of year worked; occupational mobility
  • Controls: age, experience, tenure, education, marital status, region, industry
Period
1991–2008
Sample
1,864,027 observations of employed low-skilled natives, 1995–2008, in the fixed-effects panel (20 percent random sample of natives); balanced-panel difference-in-differences regressions use 71,053 natives employed in 1994 Danish-born individuals aged 18–65, not in school or permanently disabled, focusing on low-skilled (non-college) natives, across 97 municipalities. source

Migration, neighbourhoods and refugees Labour markets, wages and sorting

When the Floodgates Open: Northern Firms' Response to Removal of Trade Quotas on Chinese Goods

Hale Utar · AEJ: Applied Economics, 2014 · Individual + firm

The dismantling of Multi-Fibre Arrangement quotas on Chinese textiles at WTO accession exposed Danish textile firms to low-wage competition. Within firms, employment, value added and intangible assets fell and the workforce shifted toward skilled workers, while firms refocused away from products where China's advantage grew.

Data
Integrated Database for Labour Market Research (IDA), Firm accounting statistics (Regnskabsdata / FIRE), International trade data from customs records (Udenrigshandel / UHDI), Domestic production/sales by product (Varestatistik / VARES), 1995–2005, EU SIGL textile and clothing quota licence database
Key variables
  • Treatment: firm produced 2005 MFA-quota goods for China in 1999 (exposure to quota removal)
  • Outcome: firm employment, value added, intangible assets, capital intensity
  • Outcome: workforce skill composition by occupation and education
  • Outcome: product scope / product innovation from transaction-level data
  • Firm fixed effects, year effects
Period
1995–2007
Sample
1,090 unique textile and clothing firms (875 firms, 1995–2005, for the product-portfolio analysis) All Danish textile and clothing firms with at least 0.5 full-time-equivalent employees, 1995–2007, matched to their employees and product transactions. source

Trade and offshoring Firms, ownership and innovation Labour markets, wages and sorting

Estimating Taxable Income Responses Using Danish Tax Reforms

Henrik Jacobsen Kleven and Esben Anton Schultz · AEJ: Economic Policy, 2014 · Individual

Uses a series of Danish tax reforms between 1984 and 2005 and full-population tax records to estimate the elasticity of taxable income. Elasticities are small for labour income (around 0.05) and larger for capital income and for top earners, and they are larger for big reforms than small ones.

Data
Income Tax Register (tax return information), Integrated Database for Labour Market Research (IDA), Authors' own tax simulator of the Danish tax system, 1984–2005
Key variables
  • Outcome: three-year changes in taxable labour income and capital income (positive and negative)
  • Treatment: change in simulated marginal net-of-tax rate
  • Instrument: mechanical (predicted) change in marginal tax rate from tax reforms
  • Controls: pre-reform (base year s−1) income levels
  • Key reforms: 1987 and 1994 Danish tax reforms
Period
Data since 1980; tax simulator and estimation 1984–2005 (three-year intervals 1984–1987 to 2002–2005)
Sample
about 37 million observations (stacked three-year differences; about 49 million before sample restrictions) Full Danish population aged 15–70 who are fully tax liable and whose base-year income is not primarily welfare benefits, 1984–2005. source

Taxation and public finance

Productivity Spillovers Across Firms through Worker Mobility

Andrey Stoyanov and Nikolay Zubanov · AEJ: Applied Economics, 2012 · Individual + firm

Tracks firm-to-firm worker moves in Danish manufacturing. Firms that hire workers from more productive firms see productivity gains of about 0.35 percent a year for an average firm, rising with the education, tenure and skill of the new hires and persisting for several years, consistent with knowledge spillovers carried by workers.

Data
Matched employer-employee data from Statistics Denmark (worker records from 1983, ages 15–65), Manufacturing firm-level accounts data with sales, value added, materials, capital and investment, 1995–2007
Key variables
  • Outcome: receiving firm's log value added per worker normalised by 4-digit industry-year mean
  • Treatment: productivity gap between sending and receiving firms of newly hired workers, weighted by hires' employment share
  • Positive and negative productivity gaps (hires from more vs. less productive firms)
  • Worker characteristics: education, occupation/skill level, experience, wage
  • Firm characteristics: size, industry
Period
1995–2007
Sample
173,929 firm-year observations (about 5.8 million worker-year observations, 668,034 job changers); benchmark regressions use 74,507 and 61,112 firm-year observations All Danish manufacturing firms and their employees with positive annual salary, 1995–2007. source

Firms, ownership and innovation Labour markets, wages and sorting Innovation

Estimating the Effect of Student Aid on College Enrollment: Evidence from a Government Grant Policy Reform

Helena Skyt Nielsen, Torben Sørensen and Christopher Taber · AEJ: Economic Policy, 2010 · Individual

A 1988 reform raised Danish student grants for students from higher-income families. Roughly 1,000 dollars of extra aid raised enrolment by about 1.35 percentage points, a response that is consistent with modest credit constraints rather than binding ones.

Data
Register-based dataset covering the entire Danish population, 1983–2005 (Statistics Denmark), Educational event histories (education registers), 1973–2005, High school GPA records, Parental income used for student-aid means-testing (tax records), Parental liquid assets from wealth/tax records
Key variables
  • Outcome: college enrollment within one year of high school graduation
  • Treatment: stipend (fraction of full student grant) the individual is eligible for
  • Variation: 1988 Danish student grant reform and kinked means-tested aid schedule
  • Running/ranking variable: parental (social) income percentile
  • Borrowing-constraint proxy: low parental liquid assets
  • Controls: high school GPA, sex, age, region, parents' education
Period
1983–2005 (population register data); high school graduation cohorts 1983–1990, estimation on cohorts 1985 and 1988–1990
Sample
108,933 high school graduates in the final selected sample; 54,843 observations in the main probit estimates (cohorts 1985, 1988–1990) Danish graduates of the ordinary academic high school track who graduated at ages 19–20 in 1983–1990, with observed GPA and parental information. source

Education

Review of Economics and Statistics

Managing Inequality: Manager-Specific Wage Premiums and Selection in the Managerial Labor Market

Alex Xi He and Daniel le Maire · Review of Economics and Statistics, 2025 · Individual + firm

Builds a manager-firm-worker matched dataset for the whole Danish population to estimate manager effects on wages. Manager-specific premiums are almost as important as firm premiums for between-firm wage inequality, are unrelated to productivity, and high-paying managers are more likely to be replaced after acquisitions.

Data
Matched employer-employee data covering all Danish workers and firms (IDA), Occupation codes used to identify managers, Firm balance sheet data for private-sector firms (FIRE), Mergers and acquisitions identified from firm and establishment identifiers
Key variables
  • Outcome: worker log wages
  • Key estimate: manager-specific wage premiums (manager fixed effects identified from worker and manager mobility)
  • Comparison: firm-specific wage premiums
  • Event: firm acquisition and manager replacement
  • Heterogeneity: industry concentration (HHI)
Period
1995–2011 (per 2019 working-paper slides)
Sample
Not stated in the sources checked Manager-firm-worker matched panel covering the entire Danish population; acquisitions sample of about 3,700 private-sector acquisitions in the 2019 working-paper version. source (abstract)

Labour markets, wages and sorting Firms, ownership and innovation Inequality and fairness

Depressed Peers in Early Parenthood

Anne Toft Hansen, Jonas Cuzulan Hirani and Miriam Wüst · Review of Economics and Statistics, 2025 · Individual

Municipal nurses assign new mothers to postnatal peer groups essentially arbitrarily conditional on a few characteristics. Exposure to a depressed peer raises a mother's own mental health care use by 11 percent two years after birth and worsens her self-reported mental health and labour market outcomes.

Data
Municipal health visitor records with mothers' group assignments and EPDS postpartum depression screening, Statistics Denmark registers: GP consultations, psychologist/psychiatrist appointments, hospital contacts for mental illness, sick leave
Key variables
  • Treatment: having a peer in the new-mother group at risk of postnatal depression (EPDS)
  • Outcome: mental health care uptake in the two years after birth
  • Outcome: hospital visits for mental illness
  • Outcome: sick leave / labour market outcomes
Period
2012–2017 (health visitor records)
Sample
Not stated in the sources checked First-time mothers assigned by municipal health visitors to new-mother groups in Danish municipalities. source (abstract)

Health Family responses and insurance Gender and the family

The Causal Effect of Scaling up Access to Psychotherapy

Benjamin Ly Serena · Review of Economics and Statistics, 2025 · Individual

A 2008 reform introduced 60 percent coverage of private psychotherapy for patients aged 18 to 37 with depression or anxiety. Using registers from 1995 to 2019, coverage reduces psychiatric hospital contacts, physical health care use and suicide attempts, leaves employment unchanged, and saves more in other health spending than it costs.

Data
National Patient Register (LPR), psychiatric and somatic hospital contacts, National Health Insurance Service Register (Sygesikringsregistret), primary care and psychologist services, Prescription drug purchases (psychiatric drugs), DREAM register (employment, sick leave, disability pension), Yearly socioeconomic registers (population, income, education)
Key variables
  • Treatment: eligibility for 60% psychotherapy coverage introduced in 2008 for depression/anxiety patients aged 18–37
  • Running variable: age relative to the age-38 eligibility cutoff (RD design)
  • Comparison: ages 18–37 vs 38–50 before/after the reform (difference-in-differences)
  • Outcome: psychiatric hospital contacts and other mental health services
  • Outcome: physical health care use and suicide attempts
  • Outcome: employment, sick leave and disability pension receipt
Period
1995–2019 (published abstract; the 2021 CEBI working paper uses 2000–2016)
Sample
Not stated in the sources checked All Danish residents, comparing those just below and above the age-38 eligibility cutoff and ages 18–37 versus 38–50 around the 2008 reform. source

Health

No Pain, No Gain: Work Demand, Work Effort, and Worker Health

David Hummels, Jakob R. Munch and Chong Xiang · Review of Economics and Statistics, 2025 · Individual + firm

Links Danish worker-firm data to hospital and prescription records to study how rising workload affects health. Increases in firm sales lead workers to log longer hours and raise the probability of stress, depression, heart disease and stroke, most for older and already strained workers; the welfare loss from sickness offsets nearly a quarter of the earnings gain.

Data
Firm Statistics Register (FIRM), Integrated Database for Labour Market Research (IDA), Firm-worker link (FIDA), Accounts Statistics (Regnskabsstatistik), Prodcom firm sales by product (VARS), Health care registers: prescription drug purchases, doctor visits and hospitalizations (National Patient Register), Monthly payroll records with earnings and hours (eIndkomst/BFL), Monthly firm VAT sales and material purchases (FIKS)
Key variables
  • Treatment: log firm sales (Prodcom), with a Bartik/shift-share instrument in robustness checks
  • Outcome: monthly hours worked and earnings
  • Outcome: stress/depression indicators (anti-depressant use, psychiatrist visits, burnout hospitalizations)
  • Outcome: heart disease drugs, heart attack/stroke and alcoholism hospitalizations
  • Fixed effects: job-spell fixed effects
Period
1995–2012 (health data 1996–2012; monthly payroll data 2008–2012)
Sample
3,336,244 annual worker-year observations; 8,834,846 monthly observations Full-time workers aged 20–60 in private-sector Danish firms in the Prodcom sales data with at least 50 employees and positive imports and exports, excluding single-year employment relationships. source

Health Labour markets, wages and sorting Firms, ownership and innovation

The Physician-Patient Match and Health Inequality

Ida Lykke Kristiansen and Sophie Yanying Sheng · Review of Economics and Statistics, 2025 · Individual

Measures general practitioners' childhood socioeconomic status from their parents' education in the registers. Low-SES patients matched to a GP of similar background have substantially lower mortality, while high-SES patients are unaffected, cutting the SES mortality gradient by a quarter through more intensive care, better detection of chronic conditions and better adherence.

Data
National Health Service Register: patient-to-GP clinic assignment, Service Provider Registry (physician IDs), Cause of Death Register, National Health Insurance Service Registry: visits, services, reimbursements, Hospital/patient data and first-line treatments for chronic conditions, Education registers and parent links (BEF/UDDA) for patient SES and physicians' parental education
Key variables
  • Treatment: assignment to a low-SES (parental education) physician after clinic closure
  • Outcome: patient mortality and cause of death
  • Outcome: detection/treatment of chronic conditions (CVC, cancer, diabetes, COPD)
  • Outcome: health care utilization (visits, services per visit, reimbursements)
  • Patient SES: highest completed education (primary school = low SES)
Period
1995–2019 (clinic closures 1999–2016)
Sample
over 352,000 adult patients affected by 894 clinic closures; 1,019,005 observations in the main mortality regression Danish adults aged 40–70 whose primary care clinic closed between 1999 and 2016, observed at least four years before the closure. source

Health Inequality and fairness

Do Export Support Programs Affect Prices, Quality, Markups, and Marginal Costs? Evidence From a Natural Policy Experiment

Magnus T. Buus, Jakob R. Munch, Joel Rodrigue and Georg Schaur · Review of Economics and Statistics, 2025 · Firm

Uses a quasi-natural experiment in the Danish Trade Council's export support to firms. Support raises firm-level exports within destination markets but leaves prices, quality, markups and marginal costs unchanged, consistent with firms growing abroad by shifting demand rather than changing products.

Data
Trade Council export promotion records: firm purchases and Trade Council approaches by destination, International Trade in Goods statistics: Intrastat and Extrastat firm exports by CN8 product and destination (UHDI), Manufacturers' Sales of Goods (VARES/Prodcom): firm sales by product, value and quantity, Firm Statistics Register (FirmStat) and Firm Accounts Statistics (FIRE)
Key variables
  • Treatment: purchase of export promotion services for a destination in year t or t-1
  • Instrument: whether the Trade Council approached the firm
  • Outcome: firm-product-destination export sales
  • Outcome: export unit values (prices), quality, markups and marginal costs
Period
2002–2015
Sample
18,181 firm-years (manufacturing exporters in Prodcom data, 77 destinations) Danish manufacturing exporters with at least 10 employees present in the production data, exporting to the 77 destinations served by the Trade Council, 2002–2015. source

Trade and offshoring Firms, ownership and innovation

Understanding the Rise in Life Expectancy Inequality

Gordon B. Dahl, Claus Thustrup Kreiner, Torben Heien Nielsen and Benjamin Ly Serena · Review of Economics and Statistics, 2024 · Individual

Decomposes widening life expectancy gaps between rich and poor into changes in age-specific mortality and differences in survivability to each age. Lower survivability of the poor explains the entire rise in Danish life expectancy inequality; cardiovascular gains helped everyone, but lifestyle-related survivability diverged.

Data
Population registers (BEF, FAIN): sex and age, Income register (IND): household income net of universal transfers, Death registers (DODAARS, DODAASG) with cause of death, US mortality by income from Chetty et al. (2016), IRS tax data
Key variables
  • Outcome: period life expectancy by income group
  • Income rank: household income measured two years before mortality
  • Decomposition: mortality changes vs. survivability
  • Cause of death: cardiovascular, cancer, lifestyle-related, other
Period
2001–2014
Sample
Not stated in the sources checked Universe of Danish residents 2001–2014, compared with US tax-return-based mortality data. source

Health Inequality and fairness

The Long-Run Effects of Individual Debt Relief

Gustaf Bruze, Alexander Kjær Hilsløv and Jonas Maibom · Review of Economics and Statistics, 2024 · Individual

Links court records on the Danish debt relief programme to the registers and uses quasi-random assignment of applicants to court trustees with different admission rates. Debt relief raises earned income, employment, assets, home ownership and wealth for more than 25 years, with the move into employment accounting for two thirds of the income gain.

Data
Hand-collected debt relief announcements from the official gazette Statstidende (court records), 1984–2005, Central Person Register (CPR) for linkage, Income Tax Register: earned income, taxable assets and debt, real estate ownership, Labour market status registers (employment status in November), Hourly wage measure from Statistics Denmark
Key variables
  • Treatment: being granted court-ordered debt relief
  • Instrument: court trustee admission rate (judge/trustee leniency design)
  • Outcome: earned income and employment
  • Outcome: taxable assets, secured and unsecured debt, home ownership, wealth
Period
Applications 1984–2003; register outcomes 1980–2019
Sample
46,571 individuals (final sample); 32,794 observations in the IV sample with 515 trustee identifiers All applicants for debt relief in Danish City Courts from 1984 to 2003, linked to national registers. source

Household finance, saving and consumption Labour markets, wages and sorting

Spending Response to a Predictable Increase in Mortgage Repayments: Evidence from Expiring Interest-Only Loans

Henrik Yde Andersen, Stine Ludvig Bech and Alessia De Stefani · Review of Economics and Statistics, 2024 · Individual

Matches the universe of Danish mortgages to borrower registers and studies the fully anticipated start of amortisation on interest-only loans. When instalments rise by 9 percent of income, consumption falls by 3 percent of income and stays down, with the failure to smooth concentrated among highly leveraged borrowers likely to be refused a new interest-only loan.

Data
Mortgage registry: loan-level data on the universe of Danish mortgages reported by mortgage institutions to Danmarks Nationalbank (from 2009), Income and wealth registers (IND/FORMUE): household income, bank deposits, stocks, bonds, pensions, debts, Population/household registers (BEF): family composition, residence, Imputed household consumption from income and wealth registers
Key variables
  • Treatment: expiry of the interest-only period (start of amortisation)
  • Outcome: imputed household consumption relative to income
  • Installment increase relative to income
  • Heterogeneity: loan-to-value ratio and liquid savings
Period
Mortgage registry 2009–2018; IO loans originated 2003–2007 expiring 2013–2017
Sample
46,025 household-year observations (baseline regressions); 8,813 households beginning amortization Danish households with an interest-only mortgage originated 2003–2007 whose IO period expires in 2013–2017 and who keep the original loan, excluding self-employed and house buyers/sellers. source

Household finance, saving and consumption Housing

Language Training and Refugees' Integration

Mette Foged, Linea Hasager, Giovanni Peri, Jacob Nielsen Arendt and Iben Bolvig · Review of Economics and Statistics, 2024 · Individual

A 1999 reform improved language training for newly recognised refugees. A regression discontinuity around the cut-off date shows a permanent, positive effect on earnings that emerges after classes are completed, together with more schooling and a higher probability of working in complex jobs.

Data
Integrated Database for Labour Market Research (IDA), Income register (IND), Education enrollment and completion registers, Crime register: charges and convictions, Population register (BEF), Admission/residence permit register (OPHG), Migration register (VNDS) and internal mobility register (FLYT), Register for Labour Market Policy Measures (AMFORA), Danish language training database (Danskuddannelsesdatabasen), O*NET task intensities
Key variables
  • Running variable: date refugee status granted relative to January 1, 1999
  • Treatment: 1999 reform expanding Danish language training
  • Outcome: annual earnings and employment
  • Outcome: education, occupation task complexity, crime
  • Outcome (children): lower secondary completion and crime
Period
Admissions 1997–2000; followed until 2016 (children's outcomes until 2018)
Sample
8,558 individuals; children sample of 9,730 Refugees and reunified family members aged 18–49 granted asylum in Denmark between January 1, 1997 and December 31, 2000. source

Migration, neighbourhoods and refugees Labour markets, wages and sorting Education

New Evidence on Welfare's Disincentive for the Youth Using Administrative Panel Data

Olivier B. Bargain and Anders B. Jonassen · Review of Economics and Statistics, 2024 · Individual

Maximum social assistance for childless unmarried Danes rose by 55 percent at age 25 between 2000 and 2006. Only the low-skilled respond: employment falls by 2 to 3 percent and benefit take-up rises by 10 to 14 percent, two thirds through moves from work to welfare, and crime shows no discontinuity.

Data
Danish administrative panel data on welfare benefit take-up, employment, earnings and crime (registers not named in abstract)
Key variables
  • Running variable: age relative to 25th birthday
  • Treatment: 55% increase in maximum social assistance at age 25 for childless unmarried individuals
  • Outcome: employment
  • Outcome: welfare benefit take-up
  • Outcome: criminal activity
Period
2000–2006
Sample
Not stated in the sources checked Childless unmarried young people in Denmark around age 25, with effects concentrated among the low-skilled. source (abstract)

Labour markets, wages and sorting Taxation and public finance

Public Health Policy at Scale: Impact of a Government-Sponsored Information Campaign on Infant Mortality in Denmark

Onur Altındağ, Jane Greve and Erdal Tekin · Review of Economics and Statistics, 2024 · Individual

A nationwide campaign against sudden infant death syndrome, delivered mainly through universal nurse home visits, cut infant mortality by 17 percent in a regression discontinuity on population birth data. Effects were 11 to 14 times larger for low-birthweight and preterm infants and concentrated among low-SES families.

Data
Medical Birth Register (MFR): birth weight, gestational age, parity, maternal age, immigrant status, Register of Causes of Death (exact date and cause of death), Education register (parental education)
Key variables
  • Running variable: birth month relative to December 1991
  • Treatment: birth after the 1991 change in infant sleep-position guidelines
  • Outcome: SIDS mortality per 10,000 births
  • Outcome: infant and child mortality per 10,000 births
  • Heterogeneity: low birth weight, preterm, maternal education
Period
Live births 1973–2006
Sample
568,106 births (SIDS outcome, MSE-optimal bandwidth of 52 months); 632,449 births for infant mortality (58 months) All live births in Denmark within the RD bandwidth around the December 1991 guideline change. source

Health Children, intergenerational mobility and skills

Trade Shocks, Firm Hierarchies, and Wage Inequality

Benjamin U. Friedrich · Review of Economics and Statistics, 2022 · Individual + firm

Shows that trade shocks change within-firm wage inequality by changing firm hierarchies, using both firm-level foreign demand shocks and the Muslim boycott of Danish exports after the 2006 cartoon crisis. Adding a hierarchy layer widens pay gaps throughout the firm, and delayering after the boycott compresses wages through cuts, demotions and turnover.

Data
Integrated Database for Labour Market Research (IDA) with DISCO occupation codes, Firm-Integrated Database for Labour Market Research (FIDA), Danish Business Register / firm statistics (GF): sales, value added, industry, Foreign Trade Statistics Register: firm-level exports by CN8 product and destination (UHDI), UN Comtrade bilateral trade flows (HS6), U.S. Imports of Merchandise, Penn World Tables distances, Brent oil prices (transport cost estimation)
Key variables
  • Outcome: within-firm wage inequality (std. dev. of log wages, 90-10 gap)
  • Treatment: number of hierarchy layers based on occupations
  • Instrument: firm-specific world import demand and transport-cost shocks
  • Natural experiment: 2006 Muslim boycott of Danish exports (Cartoon crisis)
Period
1999–2008
Sample
68,090 firm-year observations on 12,470 firms (within-firm inequality regressions) Universe of pre-existing private-sector exporting firms in Denmark, 1999–2008. source

Trade and offshoring Labour markets, wages and sorting Firms, ownership and innovation

Long-Run Saving Dynamics: Evidence from Unexpected Inheritances

Jeppe Druedahl and Alessandro Martinello · Review of Economics and Statistics, 2022 · Individual

Sudden parental deaths deliver unexpected inheritances. Heirs' wealth jumps and then declines over roughly a decade back toward its pre-inheritance path, which implies a moderate marginal propensity to consume out of wealth and informs the calibration of buffer-stock saving models.

Data
Wealth data from yearly third-party financial institution reports in the income/wealth registers (IND/FORMUE: BANKAKT, KURSANP, etc.), Individual tax returns / Income register (IND) for disposable income, Housing and land registers (property values, number of housing units), Birth registers / parent-child links (BEF), Mortality register / Register of Causes of Death (ICD-10 cause of death)
Key variables
  • Outcome: net worth normalized by permanent income
  • Outcome: liquid assets, housing equity, financial investments, uncollateralized debt
  • Treatment: timing of sudden parental death (ICD-10 I21–I22, V, X, Y, R96)
  • Potential inheritance: deceased parent's net worth split among children, net of inheritance tax
  • Permanent income: weighted average of past five years' disposable income
Period
1995–2012
Sample
6,286 heirs Heirs aged 25–50 at inheritance whose unmarried parent died suddenly between 1995 and 2012, with potential inheritance exceeding one year of permanent income, excluding the wealthiest 1 percent. source

Household finance, saving and consumption

Spillover Effects of Early-Life Medical Interventions

N. Meltem Daysal, Marianne Simonsen, Mircea Trandafir and Sanni Breining · Review of Economics and Statistics, 2022 · Individual

Extra medical treatment for very-low-birth-weight newborns, identified from a birth weight threshold, improves not only the treated infant but also the outcomes of older siblings, who do better in school. Family resources and parental time respond to the child's health.

Data
Medical Birth Register (MFR): birth weight, gestational age, parity, Parent and sibling links (BEF), 9th-grade exam test score register (reading and math), Education/enrollment registers, Prescription drug register (antidepressant use, from 1995), Health registers for diagnoses (intellectual disability, ADHD) and mortality, Income and labour market registers for parents
Key variables
  • Running variable: focal child's birth weight relative to 1,500-gram VLBW cutoff
  • Outcome: siblings' standardized 9th-grade reading and math test scores
  • Outcome: sibling enrollment beyond compulsory education by age 19 and high-school track
  • Mechanisms: focal-child mortality and mental health; maternal antidepressant use; parental income, employment, days worked
Period
Focal children born 1982–1993; test scores 2001–2010
Sample
5,827 sibling observations (siblings of 3,677 focal children) Siblings (same mother) of Danish children born 1982–1993 with birth weight between 1,300 and 1,700 grams. source

Health Children, intergenerational mobility and skills Education

The Impact of Immigration on Firm-Level Offshoring

William W. Olney and Dario Pozzoli · Review of Economics and Statistics, 2021 · Individual + firm

Uses the Danish refugee dispersal policy as a natural experiment and matched data on all firms and workers from 1995 to 2011. An exogenous inflow of immigrants into a municipality reduces firm-level offshoring on both margins, while immigrants' ties to their origin countries raise offshoring to those particular countries.

Data
Firm Statistics Register (FirmStat), Integrated Database for Labour Market Research (IDA), Firm-Integrated Database for Labour Market Research (FIDA), Foreign Trade Statistics Register: Intrastat and Extrastat firm-level imports (UHDI), Central Business Register (foreign ownership)
Key variables
  • Outcome: extensive margin of offshoring (firm imports in same HS4 as own production)
  • Outcome: log volume of narrow offshoring
  • Treatment: non-EU immigrant share of municipality workforce
  • Instrument: refugee placement under the 1986–1998 Spatial Dispersal Policy (shift-share)
Period
1995–2011
Sample
approximately 35,000 firms and 1 million workers Unbalanced panel of Danish private-sector firms with more than one employee in 97 municipalities, 1995–2011. source

Trade and offshoring Migration, neighbourhoods and refugees Firms, ownership and innovation

Do Lower Minimum Wages for Young Workers Raise Their Employment? Evidence from a Danish Discontinuity

Claus Thustrup Kreiner, Daniel Reck and Peer Ebbesen Skov · Review of Economics and Statistics, 2020 · Individual

Danish minimum wages jump by 40 percent at age 18. Monthly payroll records for the whole population show employment falling by 33 percent and hours by 45 percent at the discontinuity, leaving total wage payments almost unchanged, with an implied employment elasticity between 0.6 and 1.1.

Data
Monthly payroll records from the tax agency SKAT (BFL/eIndkomst) with wages and hours, Population register data at Statistics Denmark (age/birth date, parental background), School performance and job information from Statistics Denmark registers
Key variables
  • Running variable: age relative to 18th birthday
  • Outcome: monthly employment
  • Outcome: hours worked and hourly wage (earnings divided by hours)
  • Outcome: monthly earnings
Period
January 2012–December 2015
Sample
577,795 individuals and around 14 million person-month observations All individuals in Denmark aged 16–19 in a given month, Jan 2012–Dec 2015, excluding apprentices in main analyses. source

Labour markets, wages and sorting

Correlation of Brothers' Earnings and Intergenerational Transmission

Paul Bingley and Lorenzo Cappellari · Review of Economics and Statistics, 2019 · Individual

Decomposes the earnings correlation between Danish brothers into the part explained by fathers' earnings and the part due to other shared family and community factors. Intergenerational transmission accounts for a larger share of sibling similarity than simple father-son elasticities suggest, once permanent earnings and life-cycle bias are handled.

Data
Civil registration system / population register with parent-child links (BEF), Income Statistics Register (IND): annual pre-tax labour earnings from tax returns
Key variables
  • Outcome: annual pre-tax labour earnings (sum over all employments), ages 25–60
  • Family structure: father/first-son/second-son triads
  • Life-cycle: 3-year birth cohort groups and age
Period
1980–2014
Sample
303,231 men in 101,077 families; 5,488,445 earnings observations Danish fathers born 1935–1961 and their first and second sons (born 1959–1985) with the same mother, with at least five consecutive positive earnings observations. source

Inequality and fairness Children, intergenerational mobility and skills

Workers beneath the Floodgates: Low-Wage Import Competition and Workers' Adjustment

Hale Utar · Review of Economics and Statistics, 2018 · Individual + firm

Follows Danish textile and clothing workers for a decade after the removal of quotas on Chinese imports, using within-industry and within-occupation differences in exposure. Earnings and employment fall persistently, job instability in services is the main adjustment friction, and workers with manufacturing-specific education rebuild human capital through further schooling.

Data
Integrated Database for Labour Market Research (IDA): person, establishment and job files, Firm-Integrated Database for Labour Market Research (FIDA) employer-employee link, Domestic manufacturing production database (VARES), CN 8-digit products, EU SIGL database of MFA import quotas (European Commission)
Key variables
  • Treatment: 1999 employment at a firm producing goods subject to MFA quota removal for China
  • Outcome: cumulative 2002–2010 wage earnings normalized by pre-shock earnings
  • Outcome: cumulative hours, hourly wage, employment and unemployment
  • Controls: 1999 age, gender, immigrant status, occupation, education, union and UI membership
Period
1999–2010
Sample
10,521 workers All workers with primary employment in the Danish textile and clothing sector in 1999, born 1943–1982 (aged 20–67 over 2002–2010). source

Trade and offshoring Labour markets, wages and sorting

Economic Journal

Universal Investments in Toddler Health: Learning from a Large Government Trial

Jennifer L. Baker, Lise G. Bjerregaard, Christian M. Dahl, Torben S. D. Johansen, Emil N. Sørensen and Miriam Wüst · Economic Journal, 2026 · Individual

A 1960s Copenhagen government trial of preventive health care for toddlers, documented from handwritten nurse records and linked to the registers, improved a good adult health index by five percent of a standard deviation. Gains are largest for initially disadvantaged children and girls and fade for later cohorts as the counterfactual policy environment improved.

Data
Transcribed handwritten Copenhagen nurse records (Copenhagen City Archives), 1959–1967 cohorts, Central Person Register (CPR) linkage, Education registers (UDDA), Income registers (IND), Death register, National Patient Register (LPR), Copenhagen Perinatal Cohort (CPC), births 1959–1961, Family links to parents, siblings, children and spouses
Key variables
  • Treatment: born on the first three days of the month (extended toddler home-visiting trial)
  • First stage: nurse record contains a treatment table (take-up)
  • Outcome: adult SES index (years of education, post-secondary education, earnings and employment ages 30–50)
  • Outcome: adult good-health index (hospital contacts and diagnoses), mortality
  • Second-generation outcomes of trial children's own children
Period
Births 1959–1967 (trial covered births January 1959–April 1968); register outcomes 1977–2020
Sample
87,336 individuals Children born in Copenhagen 1959–1967 with transcribed nurse records linked to Statistics Denmark administrative data, excluding twins. source

Health Children, intergenerational mobility and skills

Universal Daycare and Mothers' Working Lifetime

Sarah Sander · Economic Journal, 2026 · Individual

Exploits the roll-out of daycare centres across Danish municipalities to follow mothers over their working lives. Daycare availability raises participation, hours and earnings sixteen years after the first birth, with effects driven by low-educated mothers and mediated partly through fertility and separation.

Data
1970 Census (FT70) with parish of residence, Historical daycare institution yearbooks digitised (1964–1975) and daycare institutions in registers from 1976, Population register with parent-child links and fertility histories (BEF), Earnings from tax records (income registers), 1980–2015, Supplementary Pension Fund register (ATP) contributions for hours and participation, Education registers (UDDA)
Key variables
  • Treatment: daycare availability in the mother's 1970 parish after first birth
  • Outcome: labour force participation by age of first child
  • Outcome: log annual earnings
  • Outcome: weekly hours and full-time employment from ATP contributions
  • Mediators: fertility and separation from child's father
Period
First births 1964–1975; earnings 1980–2015
Sample
370,602 mothers Non-immigrant women resident in Denmark in the 1970 census who had their first child between 1964 and 1975 and stayed in Denmark until the child turned 16. source

Gender and the family Family responses and insurance Labour markets, wages and sorting

Genetic and Socioeconomic Achievement Gaps in Elementary School

Mikkel Aagaard Houmark, Victor Ronda, Esben Agerbo, Preben Bo Mortensen and Michael Rosholm · Economic Journal, 2025 · Individual

Shows that the achievement gap by polygenic score for educational attainment is as large as the gap by socioeconomic status and widens during elementary school, but only among low-SES children. Selection into neighbourhoods and schools explains part of the SES gap but none of the genetic gap, which instead relates to conscientiousness and the learning environment.

Data
iPSYCH2015 case-cohort genotype sample (neonatal blood spots from the Danish National Biobank), Danish national tests (reading and mathematics, grades 2–8), Population registers with parent-child links (BEF), Parental income registers (IND), Parental education registers (UDDA), Psychiatric diagnoses of parents (patient registers), School and neighbourhood identifiers
Key variables
  • Outcome: standardised national reading test scores (grades 2, 4, 6, 8); mathematics tests (grades 3, 6, 8)
  • Key regressor: polygenic score for educational attainment (EA PGS)
  • Key regressor: SES index from parental income and education
  • Sibling fixed effects: within-family variation in the PGS
  • Mediators: neighbourhood and school sorting
Period
Births 1994–2008; national tests from 2010
Sample
40,136 individuals with 87,917 reading test outcomes (24,062 psychiatric cases, 16,074 random controls); sibling sample 2,705 individuals Genotyped iPSYCH children of European descent born 1994–2008 who completed at least one national test between 2nd and 8th grade. source

Children, intergenerational mobility and skills Education Inequality and fairness

Neighbourhood Gangs, Crime Spillovers and Teenage Motherhood

Christian Dustmann, Mikkel Mertz and Anna Okatenko · Economic Journal, 2023 · Individual

Uses the random assignment of refugees to municipalities between 1986 and 1998. Gang crime in the assignment neighbourhood raises boys' probability of offending before 19 and girls' probability of teenage motherhood, with lasting consequences: more inactivity for men and lower earnings and more benefit claims for women at ages 19 to 28.

Data
Immigration register, Annual population registers (BEF), Central Police Register (criminal charges and convictions), Education registers (including survey-based register of immigrants' education), Income registers and register-based labour force statistics (RAS), National Patient Register (abortions)
Key variables
  • Outcome: teenage motherhood (child born while aged 15–18); youth crime convictions for boys
  • Treatment: municipal group (gang) crime conviction rate of males 15–25 in assignment year
  • Identification: quasi-random assignment of refugees to municipalities under the 1986–1998 dispersal policy
  • Long-run outcomes: earnings, employment, education
Period
Refugee assignment 1986–1998; population registers 1980–2019
Sample
8,172 assigned refugee children; 3,792 girls in teenage motherhood estimation sample Refugee children from eight refugee-sending countries assigned to Danish municipalities at age 0–14 between 1986 and 1998, observed every year until age 19. source

Crime Migration, neighbourhoods and refugees Children, intergenerational mobility and skills Gender and the family

Education, Birth Order and Family Size

Jesper Bagger, Javier A. Birchenall, Hani Mansour and Sergio Urzúa · Economic Journal, 2021 · Individual

Develops a model of parental investment with birth order preferences and human capital cost differences that delivers a generalised quantity–quality trade-off. Danish administrative data confirm its predictions: at any given parity, children in smaller families have more education, and the average child's education falls with family size even after accounting for birth order.

Data
Integrated Database for Labour Market Research (IDA), 1980–2006, with mother-child links, Precise date of birth from Statistics Denmark (to identify twin/multiple births)
Key variables
  • Outcome: years of education (measured in 2006)
  • Key regressors: birth order and family size
  • Instrument: twin birth at last birth (twins at 2nd, 3rd or 4th birth)
  • Controls: parental education, gender, age
Period
1980–2006 (outcomes measured in 2006)
Sample
1,256,031 children in 581,159 families (excluding single-child families) Individuals aged 25–41 in 2006 whose mother was alive and present in IDA during 1980–2006, in families with completed fertility, siblings defined by common mother. source

Children, intergenerational mobility and skills Education Family responses and insurance

Family, Community and Long-Term Socio-Economic Inequality: Evidence from Siblings and Youth Peers

Paul Bingley, Lorenzo Cappellari and Konstantinos Tatsiramos · Economic Journal, 2021 · Individual

Decomposes sibling correlations in permanent earnings, education and unemployment for the Danish population into family and community components, allowing for life-cycle dynamics. Family is the dominant factor; community background shapes earnings and unemployment correlations early in working life but fades quickly.

Data
Civil registration system / population register with parent links (BEF), Central person register address histories (parish of residence), Education register / national pupil database (school at age 15), Annual earnings from tax-based income registers
Key variables
  • Outcome: pre-tax annual labour earnings (residual log earnings), 1984–2011
  • Grouping: brothers (family), schoolmates at age 15, parish neighbours at age 15
  • Parameters: sibling, school-peer and neighbour correlations over the life cycle
Period
Men born 1960–1983; earnings 1984–2011
Sample
695,960 men; 10,930,859 earnings observations (122,652 brother pairs, 380,948 singletons) Danish men born 1960–1983 (first and second sons sharing both legal parents, plus singletons and same-age peers), linked to schoolmates and parish neighbours at age 15. source

Inequality and fairness Children, intergenerational mobility and skills

Sibling Spillovers

Sandra E. Black, Sanni Breining, David N. Figlio, Jonathan Guryan, Krzysztof Karbownik, Helena Skyt Nielsen, Jeffrey Roth and Marianne Simonsen · Economic Journal, 2021 · Individual

Identifies spillovers within the family from having a disabled younger sibling using administrative data from both Denmark and Florida. Comparing first- and second-born children in families with three or more children, the second child, who spends more early childhood with the younger sibling, is differentially affected when the third child is disabled.

Data
Medical Birth Register (MFR), National Patient Register (LPR) for disability diagnoses, 9th grade exit exam grades (school/education registers), Parental education, labour market, earnings and leave registers, Florida birth records linked to Florida public school records (FCAT)
Key variables
  • Outcome: cohort-standardised 9th grade exit exam GPA (Denmark); FCAT test scores (Florida)
  • Treatment: third-born sibling has a disability (diagnosed in medical registers) observed by age five
  • Comparison: second-born vs first-born child (difference-in-differences)
  • Controls: parental age, education, labour market status, earnings, immigrant status
Period
Danish births 1990–2001; Florida births 1994–2002
Sample
Denmark: 134,277 families with first two children observed, 28,581 families with first three children (4,430 with a disabled third child by age five); Florida: 80,879 and 9,987 families Families in Denmark (births 1990–2001) and Florida (births 1994–2002) with at least three children where the first two children have the same father. source

Children, intergenerational mobility and skills Family responses and insurance Health

Gender Differences in Negotiation: Evidence from Real Estate Transactions

Steffen Andersen, Julie Marx, Kasper Meisner Nielsen and Lise Vesterlund · Economic Journal, 2021 · Individual

Men appear to secure better prices than women in Danish real estate transactions, but the gap shrinks with better controls for property value and disappears in repeat-sales and inherited-property samples. The price differences reflect men and women demanding different properties, not differences in negotiation.

Data
Property transactions from the Danish Tax and Customs Administration (SKAT), Housing register (BBR), Civil Registration System (CPR), Income and tax-assessed property values from SKAT, Education registers (Ministry of Education), Integrated Database for Labour Market Research (IDA) employment status, Cause-of-Death Register (Danish National Board of Health)
Key variables
  • Outcome: realised transaction price of house or apartment
  • Key regressor: gender of single buyer/seller
  • Controls: tax-assessed property value, BBR property characteristics, property fixed effects (repeated sales)
  • Death sales: properties inherited by an only child from a deceased parent
Period
1994–2013
Sample
337,685 real estate transactions (97,216 in repeated-sales sample; 13,953 inherited houses and apartments in death-sales sample) Arm's-length transactions of Danish houses and apartments involving single female or single male buyers and sellers, 1994–2013. source

Gender and the family Housing

Financial Trouble Across Generations: Evidence from the Universe of Personal Loans in Denmark

Claus Thustrup Kreiner, Søren Leth-Petersen and Louise Charlotte Willerslev-Olsen · Economic Journal, 2020 · Individual

Loan-level records on all personal loans show strong intergenerational persistence in financial trouble: children of parents who default are far more likely to default themselves, and the correlation is present already in early adulthood and is not explained by income or education.

Data
Loan register from the Danish Tax Agency (SKAT): all personal loan accounts with default status (60+ days late), Population register (BEF) for parent-child links, Income-tax register and other administrative registers on labour market history, income and wealth, Credit bureau bad-payer files (Experian, Debitor Registret), 2009 snapshot, Survey of 1,748 individuals on risk willingness, patience and impulsivity (2014)
Key variables
  • Outcome: child default on personal loans (60+ days late)
  • Key regressor: parental default status
  • Preference measures from survey (risk willingness, patience, impulsivity)
  • Controls: income, wealth, education, GPA
Period
2004–2011
Sample
28,027,610 parent-child-year observations on 2,501,088 individuals All Danes aged 18–45 in 2004–2011 with at least one living parent, organized as parent-child-year cells. source

Household finance, saving and consumption Inequality and fairness Children, intergenerational mobility and skills

Human Capital and Career Success: Evidence from Linked Employer-Employee Data

Anders Frederiksen and Takao Kato · Economic Journal, 2018 · Individual + firm

Uses complete Danish career histories to study who reaches top management, through internal promotion or external recruitment. Formal schooling and breadth of experience across occupations both help, they are complementary, and breadth acquired within the firm matters more than breadth acquired outside it, consistent with human capital theories of corporate leadership.

Data
Integrated Database for Labour Market Research (IDA) with DISCO occupation codes, Education registers
Key variables
  • Outcome: appointment to top management (DISCO 12/13) in firm with 100+ employees
  • Key regressor: breadth of occupational experience over prior 8 years (TOCC)
  • Formal schooling
  • Tenure, general work experience, age, gender
Period
1992–2002 (appointments in 2000 and 2001)
Sample
773,094 observations (3,813 appointed to top management) Private-sector employees in Denmark with complete 8-year occupational histories forming the contestant pool for top management positions. source

Labour markets, wages and sorting

Born with a Silver Spoon? Danish Evidence on Wealth Inequality in Childhood

Simon Halphen Boserup, Wojciech Kopczuk and Claus Thustrup Kreiner · Economic Journal, 2018 · Individual

Third-party reported wealth records of children show that wealth inequality is as high in childhood as among adults, with top shares driven by transfers from parents and grandparents. Wealth at age 18 predicts wealth in adulthood, and intergenerational wealth correlations are present from early ages.

Data
Individual wealth data from tax return records (Danish Tax Agency SKAT, via Statistics Denmark), Population register with parent identifiers (BEF), Education and income registers
Key variables
  • Outcome: child wealth and wealth rank in adulthood (age 45)
  • Key regressor: childhood wealth (age 18) and parental wealth rank
  • Inferred inter vivos transfers and bequests (bunching at gift-tax allowance)
  • Portfolio components (deposits, securities, real estate, debt)
Period
1983–2011
Sample
Pooled cross-section: on average close to 650 thousand observations per one-year age group; panel regressions: 36,102 observations All individuals aged 1–40 in 2000–2011 with living parents (pooled cross-section), plus a panel of the 1965 birth cohort with both parents alive in 2011, followed 1983–2011. source

Inequality and fairness Household finance, saving and consumption Children, intergenerational mobility and skills

School Starting Age and the Crime-Age Profile

Rasmus Landersø, Helena Skyt Nielsen and Marianne Simonsen · Economic Journal, 2017 · Individual

Children born just after the school start cut-off begin school almost a year later. Starting school older lowers crime at young ages, especially for boys, by shifting the crime-age profile rather than permanently reducing crime, consistent with an incapacitation and maturity channel.

Data
Population register with exact birth dates and parent links (BEF), Criminal charge register (charges for property, violence and other crimes, with dates), Birth records: birth weight, gestational length, APGAR score (likely Medical Birth Register, MFR; not named in paper), Education registers (age in 8th grade as proxy for school starting age), Parental education and labour market registers
Key variables
  • Outcome: criminal charge at a given age / at or before a given age (from age 15)
  • Treatment: school starting age (7.6 vs 6.6)
  • Instrument/running variable: birth date relative to January 1 cut-off (±30 days)
  • Heterogeneity: gender; crime type (property, violence, other)
Period
Children born mid-1981 to mid-1993
Sample
48,546 and 50,383 children (the two gender groups) at age 15, born in December or January (Table 1) Danish children born in December or January between December 1981 and January 1993 (main bandwidth ±30 days around January 1). source

Children, intergenerational mobility and skills Crime Education

Mathematics and Gender: Heterogeneity in Causes and Consequences

Juanna Schrøter Joensen and Helena Skyt Nielsen · Economic Journal, 2016 · Individual

A pilot scheme in Danish high schools that let students combine advanced mathematics with chemistry increased advanced maths take-up, especially among girls. The induced maths qualification raised later earnings, with the gains concentrated among students who would otherwise have taken less maths and operating through higher education choices.

Data
Education registers: detailed educational histories, high school branch choice and GPA (Statistics Denmark), Labour market registers: earnings, occupation, industry, self-employment, part-time work
Key variables
  • Outcome: log earnings (measured 18 years after high school graduation)
  • Outcomes: college graduation, field of major, occupation/top corporate jobs, sector
  • Treatment: choice of advanced high school math
  • Instrument: unexpected introduction of high school pilot scheme allowing math–chemistry combination
Period
High school entrants 1984–1986, followed into the labour market
Sample
about 25,658 females and 19,406 males from about 140 high schools Danish high school entrants of 1984–86 who graduated in three years and have at least one year of employment. source

Education Gender and the family Labour markets, wages and sorting

Housing Wealth and Consumption: A Micro Panel Study

Martin Browning, Mette Gørtz and Søren Leth-Petersen · Economic Journal, 2013 · Individual

Uses register-based imputed consumption and house price changes over the 1987 to 1996 boom and bust to test whether housing wealth drives spending. For most households consumption does not respond to unanticipated house price changes; the response is confined to young households, consistent with a collateral rather than a wealth effect.

Data
Administrative income and wealth (tax) registers for a 10% random sample of the Danish population aged 16+, House price / housing wealth information from registers
Key variables
  • Outcome: imputed household total expenditure (disposable income minus change in net wealth)
  • Key regressor: unexpected changes in house prices / housing wealth
  • Heterogeneity: age, owners vs renters, credit constraints (1992–93 mortgage reform allowing home-equity borrowing)
  • Disposable household income
Period
1987–1996
Sample
Not stated in the sources checked Married or cohabiting stable couples from a 10% random sample of the Danish population aged 16+, who were either homeowners or renters throughout the period. source

Household finance, saving and consumption Housing

Is Business Failure Due to Lack of Effort? Empirical Evidence from a Large Administrative Sample

Mette Ejrnæs and Stefan Hochguertel · Economic Journal, 2013 · Individual

Danish self-employed can voluntarily buy unemployment insurance, which creates a moral hazard test. Using a large administrative panel, insured entrepreneurs are more likely to close their businesses and enter unemployment, with effects that strengthen as the eligibility date approaches, consistent with reduced effort rather than selection alone.

Data
CAM 10% Sample: 10% random sample of the Danish population aged 16+ (linked administrative registers incl. tax and benefit records), Unemployment insurance fund membership records
Key variables
  • Outcome: transition from self-employment to unemployment (registered unemployed >10% of year)
  • Treatment: UI fund membership (insurance status)
  • Instrument: eligibility for early retirement scheme (VERP) available only to UI members
  • Estimator: bivariate random effects probit
Period
1981–1998
Sample
13,434 individuals and 86,092 observations (estimation sample) Denmark-born male Danish citizens aged 25–59 who were self-employed in their first three observed years, excluding agriculture, from the CAM 10% sample. source

Labour markets, wages and sorting Firms, ownership and innovation

Unemployment Insurance, Wage Dynamics and Inequality Over the Life Cycle

Paul Bingley, Lorenzo Cappellari and Niels Westergård-Nielsen · Economic Journal, 2013 · Individual

Models permanent and transitory wage dynamics over the life cycle for Danish men, allowing dynamics to differ by unemployment insurance membership. Insurance is associated with lower wage inequality and less persistence of shocks, and the paper quantifies how much of life-cycle wage inequality UI members avoid relative to non-members.

Data
Administrative register data on the Danish labour force (Statistics Denmark): annual labour earnings and hours-derived hourly wages, UI fund membership contributions reported to tax authorities, Mandatory pension contributions (ATP) for year of labour market entry
Key variables
  • Outcome: log gross hourly wage (permanent and transitory components)
  • Key regressor: UI fund membership
  • Potential labour market experience
  • Birth cohort (1943–1973, 31 cohorts)
Period
1980–2003
Sample
roughly 810,000 individuals, about 12.5 million person-year observations Danish men aged 21–55, full-time private-sector employees, born 1943–1973, with at least five consecutive valid wage observations. source

Labour markets, wages and sorting Inequality and fairness

Estimating Class-size Effects using Within-school Variation in Subject-specific Classes

Eskil Heinesen · Economic Journal, 2010 · Individual

Uses within-school variation over time in the size of French classes, which Danish seventh graders choose between French and German, as quasi-random variation in class size. Larger classes lower French exam marks, especially for weaker students and boys, and marks in subjects taught in the regular class serve as a check on selection.

Data
Administrative registers on 9th-grade marks and exam results, school attended, merged via personal and school ID numbers, Family background registers (parents' education, income, labour market status, family structure)
Key variables
  • Outcome: French examination marks at end of 9th grade
  • Treatment: French class size (school/year cell)
  • Identification: within-school year-to-year variation in subject-specific class size
  • Placebo/control: marks in other subjects taught in basic classes
Period
School years 2001/2002–2003/2004
Sample
6,507 students in 782 school/year cells and 375 schools 9th-grade students in 2002–2004 studying French at schools offering both German and French from 7th grade, with at most 20 French students per grade. source

Education Children, intergenerational mobility and skills

Job Satisfaction and Co-worker Wages: Status or Signal?

Andrew E. Clark, Nicolai Kristensen and Niels Westergård-Nielsen · Economic Journal, 2009 · Individual + firm

Links survey measures of job satisfaction to register wages of all co-workers at the same establishment. Satisfaction is higher when co-workers earn more, the opposite of the usual income comparison result, which the authors interpret as co-worker pay signalling one's own future earnings; the effect is stronger for men and in the private sector.

Data
Danish sample of the European Community Household Panel (ECHP), eight waves, Integrated Database for Labour Market Research (IDA), matched via CPR number
Key variables
  • Outcome: overall job satisfaction (1–6 scale)
  • Key regressor: co-workers' wages within the same establishment
  • Own wage (gross annual income from IDA)
  • Wage deficit relative to establishment wage distribution
Period
1994–2001
Sample
about 16,000 observations on around 4,100 individuals Employees in the Danish ECHP 1994–2001 matched to IDA, in establishments with at least 5 colleagues. source

Labour markets, wages and sorting

Are Homeowners Really More Unemployed?

Jakob Roland Munch, Michael Rosholm and Michael Svarer · Economic Journal, 2006 · Individual

Tests the Oswald hypothesis that home ownership raises unemployment. Danish homeowners are less geographically mobile, but they find local jobs faster, so their unemployment spells are shorter overall. Ownership does not raise aggregate unemployment.

Data
Administrative register data on unemployment spells for a 2.5% random sample of the Danish population, Regional unemployment measure from the Institute for Local Government Studies (1987–2000)
Key variables
  • Outcome: unemployment duration in weeks
  • Outcome: exit destination (new job locally, job in another commuting area, other states)
  • Key regressor: home ownership indicator
  • Controls: age, gender, children, household type, immigrant status, education, UI fund membership and replacement rate
Period
1997–2000
Sample
18,992 persons with 52,738 unemployment spells Flow sample of all unemployment spells in 1997–2000 for individuals aged 19–66 in a 2.5% random sample of the Danish population. source

Labour markets, wages and sorting Housing

Is there a Threat Effect of Labour Market Programmes? A Study of ALMP in the Danish UI System

Lars Pico Geerdsen · Economic Journal, 2006 · Individual

Exploits the timing rules for compulsory activation in the Danish unemployment insurance system to test whether the prospect of being activated speeds up exit from unemployment. Exit rates rise markedly as the activation deadline approaches, which identifies a sizeable threat effect of active labour market programmes.

Data
Danish UI system administrative data (not specified in abstract)
Key variables
  • Outcome: exit from unemployment to employment before programme participation
  • Identification: legislative changes to the length of the UI benefit period before compulsory activation
  • Treatment: approach of compulsory ALMP participation (threat effect)
Period
Not stated in the sources checked
Sample
Not stated in the sources checked Unemployed UI recipients in Denmark subject to compulsory labour market programmes after the benefit period. source (abstract)

Labour markets, wages and sorting

Imputing Consumption from Income and Wealth Information

Martin Browning and Søren Leth-Petersen · Economic Journal, 2003 · Individual

Tests whether consumption can be imputed from register data as income minus the change in wealth, by comparing the imputation with expenditure survey responses for the same households. The imputation works well for most households but is noisy for those with housing transactions or large stock holdings.

Data
Danish Expenditure Survey 1994–96, Administrative income and wealth (tax) records: disposable income and year-end asset holdings
Key variables
  • Outcome: survey-reported total household expenditure
  • Imputed consumption: disposable income minus change in wealth
  • Year-end holdings of different assets
Period
1994–1996 survey years, linked to register years around the survey year
Sample
Not stated in the sources checked Households in the 1994–96 Danish Expenditure Survey linked to their administrative income and wealth records. source (abstract)

Household finance, saving and consumption Measurement and methods

Worker Flows and Job Flows in Danish Manufacturing, 1980–91

Karsten Albæk and Bent E. Sørensen · Economic Journal, 1998 · Individual + firm

One of the first uses of the IDA matched employer-employee data to measure job creation, job destruction and worker flows across Danish manufacturing plants. Worker turnover far exceeds job reallocation, and both are large and persistent at the plant level.

Data
Plant-level data on all Danish manufacturing plants and their workers (register not named in abstract)
Key variables
  • Outcome: worker flows (hires and separations)
  • Outcome: job flows (job creation and destruction)
  • Replacement hiring (separations from and hires into existing jobs)
  • Business-cycle variation
Period
1980–1991
Sample
Not stated in the sources checked All individual manufacturing plants in Denmark, 1980–91. source (abstract)

Labour markets, wages and sorting Firms, ownership and innovation

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Working Hours, Top Management Appointments, and Gender: Evidence from Linked Employer-Employee Data

Anders Frederiksen, Takao Kato and Nina Smith · Journal of Labor Economics, 2026 · Individual + firm

Links the Danish Labour Force Survey's detailed hours to register career histories. Long hours, hours relative to peers and nonstandard hours raise the odds of a top management appointment within the firm, and the gender gap in hours, driven mainly by supply-side factors, is a major contributor to the gender gap in reaching top management.

Data
Integrated Database for Labour Market Research (IDA), Danish Labour Force Survey (DLFS/AKU) linked on person identifier, Organizational hierarchy codes (occupation-based) from registers
Key variables
  • Outcome: appointment to a top management position between year t and t+1
  • Explanatory: weekly working hours from the Labour Force Survey in year t
  • Heterogeneity: gender (gender gap in hours and promotions)
  • Hierarchy level: top manager, manager, white-collar, blue/grey-collar
  • Controls: experience, tenure, education, children, marital status
Period
1994–2010
Sample
168,499 employees Danish employees randomly sampled in the Labour Force Survey 1994–2010, merged with IDA register data (IZA DP 11675 working-paper version). source

Gender and the family Labour markets, wages and sorting

Instrumental Variables with Unordered Treatments: Theory and Evidence from Returns to Fields of Study

Eskil Heinesen, Christian Hvid, Lars Kirkebøen, Edwin Leuven and Magne Mogstad · Journal of Labor Economics, 2026 · Individual

Shows that the assumptions needed to identify returns to unordered treatments, such as fields of study, have testable implications, and characterises the bias when they fail. Using admission cut-offs and applicants' ranked choices in Denmark and Norway, payoffs to fields are strongly correlated across the two countries once fields violating the assumptions are dropped.

Data
Danish administrative data on all applications to post-secondary education 1994–2002 (coordinated admission system), Population register and other registers (background, completed field of study, annual earnings), Norwegian post-secondary application data 1998–2004 linked to registers (comparison country)
Key variables
  • Outcome: annual earnings eight years after application (wages, self-employment and income-replacing transfers)
  • Treatment: completed field of study (nine broad fields)
  • Instrument: application score just above vs below the admission cutoff of the preferred field
  • Preferred and next-best field from applicants' rankings
Period
Applications 1994–2002 (Denmark), outcomes eight years after application
Sample
Not stated in the sources checked First-time applicants to Danish post-secondary education without a prior post-secondary degree who applied to at least two broad fields, with the preferred field having an admission cutoff, and who completed a field within eight years (paralleled with Norwegian applicants). source

Education Measurement and methods

Educational Ambition, Marital Sorting, and Inequality

Frederik Almar, Benjamin Friedrich, Ana Reynoso, Bastian Schulz and Rune Vejlin · Journal of Labor Economics, 2026 · Individual

Classifies detailed Danish education programmes into ambition types by their graduates' starting wages and wage growth. Assortative matching by educational ambition has risen sharply even though sorting by conventional education levels looks flat, and the marriage market accounts for more than 40 percent of the rise in household income inequality since 1980.

Data
Population register with partner links (BEF), Education register with four-digit ISCED programme codes (UDDA), Employment register with hourly wages (IDAN), Income register (IND), Danish Labour Force Survey (LFS/AKU), 2000–2018, Employment register for hours, part-time/full-time (RAS)
Key variables
  • Classification: educational 'ambition types' from programme-level starting wages and wage growth (about 1,800 programmes)
  • Outcome: marital sorting by ambition type (assortative matching)
  • Outcome: household labour income inequality
  • Wage measure: residualised log hourly wages by programme
  • LFS job attributes: hours, evening/weekend/home work
Period
1980–2018
Sample
on average 3,031,511 individuals per year aged 19–60; 1,800,866 individuals in couples per year All individuals living in Denmark aged 19–60 in 1980–2018, with couples defined as married or cohabiting opposite-sex partners. source

Family responses and insurance Inequality and fairness Education

Permanent Residency and Refugee Immigrants' Skill Investment

Jacob Nielsen Arendt, Christian Dustmann and Hyejin Ku · Journal of Labor Economics, 2025 · Individual

A Danish reform tightened the employment and language requirements refugees must meet to obtain permanent residency. Rather than encouraging investment, it lowered overall employment and barely moved language proficiency, because refugees with weak pre-reform prospects reduced effort when the requirements looked out of reach.

Data
Population, income, education and immigration registers linked via the Central Person Registry, Danish language test results, Employment in annual full-time equivalents (register data)
Key variables
  • Outcome: annual employment in full-time equivalents
  • Outcome: passing the Danish language test at intermediate or higher level
  • Treatment: temporary residency in Jan–Oct 2004 (exposed to the 2007 permanent-residency reform) vs Jan–Oct 2003
  • Heterogeneity: pre-reform employment or language performance type
  • Time: years since temporary residency (YSR 1–7)
Period
Residency cohorts 2003–2004, followed seven years since temporary residency (to 2011)
Sample
767 unique individuals; 5,122 person-year observations Refugees aged 18–64 who applied for asylum after 28 February 2002 and received temporary residency in Jan–Oct 2003 (control) or Jan–Oct 2004 (treatment). source

Migration, neighbourhoods and refugees Labour markets, wages and sorting Education

The Impact of the Level and Timing of Parental Resources on Child Development and Intergenerational Mobility

Sadegh Eshaghnia, James J. Heckman and Rasmus Landersø · Journal of Labor Economics, 2025 · Individual

Uses Danish registers covering parents' full income histories to separate the level of parents' lifetime resources from their timing during childhood. Lifetime resources matter far more than when income arrives, and conventional intergenerational elasticities based on short income windows give a misleading picture of mobility.

Data
Population register with family links (BEF), Education register (UDDA), Income, assets and transfers register (IND), Sentencing register (KRAF), Incarceration register (KRIN), Danish Household Expenditure Survey, Danish Longitudinal Survey of Children (DALSC), 9th-grade national leaving exam scores
Key variables
  • Outcome: child income at ages 30–35 (IGE)
  • Outcome: years of education by age 35
  • Outcome: any criminal conviction by age 35
  • Outcome: math test score at age 16 and language test at age 11
  • Explanatory: level and timing of parental income/resources by child age (lifetime vs snapshot)
Period
1980–2019
Sample
around 100,000 children and their families (105,953 individuals; 98,686 in the IGE log-log sample) Children born in 1981 and 1982 linked to their parents, non-migrants with non-migrant parents; plus the 1995–1997 birth cohorts for exam scores and DALSC children born 1995. source

Children, intergenerational mobility and skills Inequality and fairness

Is Parental Leave Costly for Firms and Coworkers?

Anne Ardila Brenøe, Serena Canaan, Nikolaj A. Harmon and Heather N. Royer · Journal of Labor Economics, 2024 · Individual + firm

Compares small Danish firms where a female employee is about to give birth with similar firms without an impending birth. There is little evidence of negative effects on firm output or coworkers: most firms cover the absence by hiring temporary workers and raising other employees' hours, and only firms unable to reallocate work show losses.

Data
Central Person Registry with parent-child links (CPR/BEF), Parental leave benefit payouts and employer leave reimbursements, Central education register (UDDA), Integrated Database for Labour Market Research (IDA), Annual employer wage payment records (CON and RAS), Mandatory pension contributions for approximate hours (ATP), Value-added tax (VAT) firm sales and purchases data
Key variables
  • Treatment: a female employee at a small private firm giving birth (event year)
  • Outcome: firm employment, FTE hours, wage bill (total and excluding leave), sales, gross profit proxy, survival
  • Outcome: coworker hours, earnings, employment and sick days
  • Mechanism: parental leave days at the firm
  • Design: dynamic difference-in-differences with matched control events
Period
2001–2013 (births 2003–2012)
Sample
24,829 treatment events (births) and 162,151 control events covering 45,940 unique firms; 9,934 treatment events in 16,080 firms after trimming Births to prime-age (21–35) women employed in small private-sector Danish firms, compared with matched control firms without such births. source

Gender and the family Firms, ownership and innovation Family responses and insurance

Grades and Employer Learning

Anne Toft Hansen, Ulrik Hvidman and Hans Henrik Sievertsen · Journal of Labor Economics, 2024 · Individual

Uses a nationwide rescaling of Danish university grades to identify the return to GPA that is unrelated to ability. A reform-induced higher GPA raises earnings right after graduation, especially for graduates with fewer other signals, but the effect fades within a few years, consistent with employers learning quickly about productivity.

Data
University student records (Aarhus University and University of Copenhagen) with grades before and after the 2007 recoding, Administrative registers from Statistics Denmark (background, parental income and education, earnings)
Key variables
  • Outcome: log total gross earnings in each of the first five calendar years after graduation
  • Treatment: reform-induced change in GPA from the 1 August 2007 recoding to the new grading scale
  • Outcome: indicator for positive earnings
  • Controls: gender, age at graduation, high school GPA, parental income, employment and education
Period
Students enrolled on 1 August 2007 who graduated before 2011; earnings for the first five years after graduation
Sample
3,813 students Master's students at Aarhus University or University of Copenhagen enrolled on 1 August 2007 with at most 40 ECTS remaining who graduated before 2011. source

Education Labour markets, wages and sorting

Unemployed Job Search across People and over Time: Evidence from Applied-For Jobs

Jonas Fluchtmann, Anita M. Glenny, Nikolaj A. Harmon and Jonas Maibom · Journal of Labor Economics, 2024 · Individual

Uses the logs of job applications made by Danish unemployment insurance recipients to document how the jobs people apply for differ across job seekers and change over an unemployment spell, and what these patterns imply for models of directed search.

Data
Joblog applied-for job records (Danish Agency for Labour Market and Recruitment), DREAM event-history register of public transfers, Integrated Database for Labour Market Research (IDA), Employment statistics for employees with hours and earnings (BFL), Firm purchases data (FIKS), Auxiliary survey of UI recipients on application coverage, O*NET Related Occupation Matrix
Key variables
  • Outcome: predicted log wage of applied-for jobs (occupation and AKM firm effect)
  • Outcome: share of applied-for jobs that are full-time
  • Outcome: scope of search index (commute time, related occupation, related industry)
  • Outcome: share of applications to publicly posted vacancies
  • Time variable: month of unemployment spell
Period
September 2015–September 2017
Sample
127,695 individuals (spells) and over 4 million applied-for jobs Individuals of Danish origin starting UI spells between September 2015 and September 2017, eligible for the full two years of benefits, with spells of at least 8 weeks and at least one registered application. source

Labour markets, wages and sorting

Comparing the Effects of Policies for the Labor Market Integration of Refugees

Mette Foged, Linea Hasager and Giovanni Peri · Journal of Labor Economics, 2024 · Individual

Uses quasi-experimental variation from several Danish reforms to compare, in a common framework, the long-run employment and earnings effects of language training, active labour market programmes and benefit cuts for refugees, and ranks the policies by their effects and costs.

Data
Admission Register (OPHG), Migration register (VNDS), Integrated Database for Labour Market Research (IDA), Income register (IND), Population register (BEF), Education register (UDDA), Family register (FAM)
Key variables
  • Outcome: employment (any employment in the year)
  • Outcome: annual gross labour earnings (2015 USD)
  • Policy 1: initial dispersal across municipalities (conditional random assignment)
  • Policy 2: 1999 language training reform (RD at 1 January 1999 admission)
  • Policy 3: Start Aid welfare benefit cut (RD at 1 July 2002 admission)
  • Policy 4: 'Industry Packages' ALMP rolled out across municipalities 2015–2018
Period
1986–2008 refugee arrivals (outcomes followed up to 15 years; ALMP analysis January 2008–April 2019)
Sample
56,192 adult refugees Refugees and family-reunified refugees aged 18–55 on arrival who settled in a Danish municipality 1986–2008, split into policy-specific arrival cohorts. source

Migration, neighbourhoods and refugees Labour markets, wages and sorting

Network Connections and Board Seats: Are Female Networks Less Valuable?

Emma von Essen and Nina Smith · Journal of Labor Economics, 2023 · Individual + firm

Uses Danish employer-employee data from 1995 to 2011 to study how professional networks affect first appointments to supervisory boards. Larger networks raise the chance of a board seat, more so for men, because men's networks connect them more often to larger and listed firms and to other men.

Data
Matched employer-employee data for the Danish labour market
Key variables
  • Outcome: first-time appointment to a supervisory board
  • Explanatory: size of professional network
  • Heterogeneity: gender
  • Network composition: connections to large/listed firms, to men, and to incumbent directors
Period
1995–2011
Sample
Not stated in the sources checked Danish workers observed in employer-employee data 1995–2011, studied for first-time supervisory board appointments. source (abstract)

Gender and the family Labour markets, wages and sorting Firms, ownership and innovation

Constraints on Hours within the Firm

Claudio Labanca and Dario Pozzoli · Journal of Labor Economics, 2022 · Individual + firm

Uses Danish linked employer-employee data with hours and tax-rate variation from the 2010 Danish tax reform. Employees in firms with tight constraints on working hours do not adjust their hours when their taxes change, while employees in more flexible firms respond both directly and through spillovers from their coworkers.

Data
Integrated Database for Labour Market Research (IDA), Wage statistics with annual regular and overtime hours (Lønstatistikken, LON), Firm Statistics Register (Firmstat), Danish Foreign Trade Statistics Register, Firm-Integrated Database for Labour Market Research (FIDA), Danish Tax Register (income tax records), O*NET occupational data
Key variables
  • Outcome: annual hours worked (regular plus overtime)
  • Treatment: change in simulated marginal tax rate from the 2010 Danish tax reform (2008–2011 interval)
  • Moderator: firm-level hours constraints/coordination measured by within-firm dispersion of hours
  • Hourly wage: annual earnings over total hours
  • Spillovers: tax changes of coworkers
Period
2003–2011
Sample
more than 400,000 employees and approximately 8,300 firms (787,683 individual-year observations) Full-time employees aged 15–65 in private firms where hours are reported for at least 95% of the workforce, 2003–2011 (working-paper version 'Coordination of Hours within the Firm', IZA DP 12062). source

Labour markets, wages and sorting Taxation and public finance Firms, ownership and innovation

Exposure to More Female Peers Widens the Gender Gap in STEM Participation

Anne Ardila Brenøe and Ulf Zölitz · Journal of Labor Economics, 2020 · Individual

Exploits idiosyncratic variation in the share of female peers across cohorts within Danish high schools. A higher share of female peers lowers women's probability of enrolling in and graduating from STEM programmes and raises men's, widening the gender gap in STEM.

Data
Student/education registers with high school, track and cohort identifiers (UDDA), Population register with parental links (BEF), Parental income and education registers (IND, UDDA), Earnings and employment registers, Occupation codes (STEM occupations), Fertility from population/birth registers
Key variables
  • Outcome: STEM college enrolment and completion (ISCED fields 05, 06, 07)
  • Treatment: proportion of female peers in school-cohort of the math track
  • Identification: within-school across-cohort variation (school and cohort fixed effects)
  • Long-run outcomes: STEM occupation, earnings at age 36, gender wage gap, fertility
Period
High school entry 1980–1994; outcomes followed up to 20 years after entry
Sample
182,211 students in 127 schools (1,877 school-cohort observations) All students entering the math track of Danish academic high schools between 1980 and 1994, excluding schools with tiny or atypical cohorts. source

Education Gender and the family

The Opportunity Costs of Mandatory Military Service: Evidence from a Draft Lottery

Paul Bingley, Petter Lundborg and Stéphanie Vincent Lyk-Jensen · Journal of Labor Economics, 2020 · Individual

Uses the Danish draft lottery to estimate the effect of conscription on later outcomes. Military service delays education and labour market entry, and the paper quantifies the resulting losses in schooling and earnings for those who serve.

Data
Danish Defence military register (Armed Forces Day draft records: IQ test, eligibility, height, lottery number), Earnings from employer reports to tax authorities (income registers), Education registers (UDDA), Central Crime Register, National hospital discharge register (LPR), Medical Birth Register (MFR) birth weight, Population register (BEF)
Key variables
  • Outcome: annual labour income at ages 25–35
  • Treatment: military service
  • Instrument: draft lottery number below the threshold
  • Heterogeneity: cognitive ability (draft board IQ test)
  • Mechanisms: years of schooling, employment, health care use, crime
Period
Birth cohorts 1976–1983; earnings at ages 25–35
Sample
152,269 men without missing earnings (military register covers 155,570 fit-for-service conscripts) Danish men born 1976–1983 declared fit for military service who drew a draft lottery number at the Armed Forces Day. source

Labour markets, wages and sorting Education

Birth Order and Delinquency: Evidence from Denmark and Florida

Sanni Breining, Joseph Doyle, David N. Figlio, Krzysztof Karbownik and Jeffrey Roth · Journal of Labor Economics, 2020 · Individual

In both Denmark and Florida, second-born boys are substantially more likely than their first-born brothers to be disciplined in school and to enter the criminal justice system. The evidence points to reduced parental time investment for later-born children, rather than differences in health at birth or neighbourhood, as the mechanism.

Data
Medical Birth Register (MFR), Population register with parent and sibling links (BEF), Central Crime Register (convictions, sentences, incarceration), School registers (9th grade exit exam grades), Register of Daycare Institutions, National Patient Register (LPR) and Psychiatric Central Register, Parental education, employment, earnings and maternity leave registers, Florida birth records linked to school and juvenile justice records
Key variables
  • Outcome: criminal conviction by age 16 and 21; sentenced to prison; incarcerated
  • Treatment: being second-born vs first-born boy (sibling fixed effects)
  • Outcome: 9th grade exit exam grades in reading and math
  • Mechanisms: maternal leave and employment, daycare enrolment ages 1–3, school starting age, psychiatric diagnoses by age 10
  • Controls: parental age, education, employment, family income, immigrant status
Period
Danish birth cohorts 1981–1990; Florida births 1994–2002
Sample
Denmark: 121,100 children in 60,550 families (first- and second-born boys); 448,979 singleton births 1981–1990 in the full Danish population Danish families with two or more children with the same father, comparing first-born and second-born boys born 1981–1990 (plus Florida comparison samples). source

Crime Children, intergenerational mobility and skills Family responses and insurance

Estimating Equilibrium Effects of Job Search Assistance

Pieter Gautier, Paul Muller, Bas van der Klaauw, Michael Rosholm and Michael Svarer · Journal of Labor Economics, 2018 · Individual

A randomised activation experiment in two Danish counties helped treated job seekers find work faster, but untreated job seekers in the same counties found work more slowly than in comparison counties. An equilibrium search model fitted to the data shows that these displacement effects make a large-scale rollout far less beneficial than the partial estimates suggest.

Data
National Labour Market Board administrative data on unemployment benefit spells (all Danish counties), Randomised activation experiment assignment (Storstrøm and South Jutland, birth date 1st–15th of month), Income transfer data (exit destinations), National Labour Market Board monthly stock of open vacancies by county (from local job centres)
Key variables
  • Outcome: unemployment duration / exit rate from benefits (weeks)
  • Treatment: assignment to intensive activation programme (born 1st–15th of month)
  • Spillover comparison: non-participants in experiment counties vs comparison counties (difference-in-differences)
  • Outcome: log stock of open vacancies by county and month
  • Structural equilibrium search model parameters
Period
Benefit inflows November 2004–February 2005 (pre-experiment) and November 2005–February 2006 (experiment), followed up to two years; vacancies January 2004–November 2007
Sample
40,403 benefit claimants in experiment period (3,751 experiment participants: 1,814 treated, 1,937 controls); 49,063 in pre-experiment sample All individuals in Denmark who started collecting regular unemployment benefits between November 2005 and February 2006, plus a pre-experiment inflow cohort one year earlier. source

Labour markets, wages and sorting

Measurement Error in Income and Schooling and the Bias of Linear Estimators

Paul Bingley and Alessandro Martinello · Journal of Labor Economics, 2017 · Individual

Links survey reports of income and schooling for Danish respondents to the same variables in the registers. Measurement errors in survey income and schooling are correlated and non-classical, so standard corrections fail, and the paper quantifies the resulting bias in linear estimators such as returns to schooling.

Data
Survey of Health, Ageing and Retirement in Europe (SHARE), Danish respondents, Danish administrative income registers, Danish administrative education registers
Key variables
  • Variable validated: survey-reported annual income vs register income
  • Variable validated: survey-reported schooling vs register schooling
  • Estimand: measurement error bias in OLS and IV estimators of returns to schooling
Period
Not stated in the sources checked
Sample
Not stated in the sources checked Danish SHARE respondents linked to administrative registers to validate survey income and schooling. source (abstract)

Measurement and methods Education

The Dynamics of Marriage and Divorce

Gustaf Bruze, Michael Svarer and Yoram Weiss · Journal of Labor Economics, 2015 · Individual

Estimates a dynamic model of marriage, divorce and remarriage with learning about match quality on long register histories of Danish cohorts. Spousal education is complementary in generating marital surplus, education stabilises marriages, education raises men's share of the surplus, and divorce costs are high both early and late in a marriage.

Data
Population register with marital and cohabitation histories (BEF), Education registers (UDDA), completed education at age 46
Key variables
  • Outcome: transitions into and out of marriage, divorce and remarriage
  • Key variable: completed education group at 46 (high school or less, vocational, college)
  • Assortative matching by education of spouses
  • Structural model parameters: match quality, gains from marriage, divorce costs
Period
1980–2006 (ages 20 to 46)
Sample
61,780 individuals (31,835 men and 29,945 women) All men and women born in Denmark in 1960 with complete residence records 1980–2006 and not married at age 20. source

Family responses and insurance Gender and the family Education

Wage Dispersion and Decentralization of Wage Bargaining

Christian M. Dahl, Daniel le Maire and Jakob R. Munch · Journal of Labor Economics, 2013 · Individual + firm

Exploits the shift in Denmark during the 1990s from centralised to firm-level wage bargaining. Workers covered by firm-level bargaining earn a wage premium, returns to skills are higher, and wage dispersion is greater than under sector-level bargaining.

Data
Integrated Database for Labour Market Research (IDA), matched employer-employee data, Income register (tax files), Supplementary Pension Fund (ATP) contributions for hours worked, DA/LO bargaining-segment classification by NACE industry and DISCO occupation (Confederation of Danish Employers)
Key variables
  • Outcome: log hourly wage (labour income plus mandatory pension payments over hours)
  • Treatment: wage-setting system (standard-rate, minimum-wage, minimum-pay, firm-level bargaining)
  • Outcome: wage dispersion (quantile regressions) and returns to skills
  • Controls: gender, children, marriage, immigrant status, education, experience, plant size, industry-by-year dummies
  • Worker fixed effects; changes in wage-setting system over time
Period
1992–2001
Sample
about 1.14 million worker-year observations (1,137,367) 30% random sample of full-time private-sector workers aged 25–65 in 36 DA/LO bargaining segments, in plants with at least five employees. source

Labour markets, wages and sorting Inequality and fairness

Ethnic Enclaves and Immigrant Labor Market Outcomes: Quasi-Experimental Evidence

Anna Piil Damm · Journal of Labor Economics, 2009 · Individual

Uses the quasi-random dispersal of refugees across Danish municipalities between 1986 and 1998 to separate the effect of living in an ethnic enclave from self-selection. Larger enclaves raise refugee men's annual earnings without changing their employment rates, and the gains are larger where more co-nationals are employed, pointing to job information networks.

Data
Longitudinal administrative registers on the immigrant population (Statistics Denmark), 1984–2000, Population register (BEF) incl. country of origin, year of immigration and municipality, Survey-based register on immigrants' pre-immigration education and integrated pupil register, Municipality statistics: unemployment register, election statistics, register-based labour force statistics, housing statistics, Danish Refugee Council administrative statistics on temporary housing (to identify assignment municipality)
Key variables
  • Outcome: employment probability
  • Outcome: real annual labour earnings
  • Key regressor: ethnic enclave (co-national group) size in municipality
  • Instrument / identification: initial assignment municipality under the 1986–1998 spatial dispersal policy
  • Controls: gender, age, marital status, children, education, country of origin, year of immigration
Period
Registers 1984–2000; refugee immigration cohorts 1986–1993
Sample
13,927 individuals (balanced panel observed annually for seven years after immigration) Adult refugees from 11 main refugee-sending countries assigned to Danish municipalities under the dispersal policy, observed annually from receipt of residence permit to seven years after. source

Migration, neighbourhoods and refugees Labour markets, wages and sorting

On-the-Job Search and the Wage Distribution

Bent Jesper Christensen, Rasmus Lentz, Dale T. Mortensen, George R. Neumann and Axel Werwatz · Journal of Labor Economics, 2005 · Individual + firm

Estimates an on-the-job search model on the Danish Integrated Database for Labour Market Research, splitting each firm's separation rate into an exogenous part and a job-to-job part that falls with the firm's wage. Workers search less intensely the higher their wage, and the estimated model accounts for the gap between the distribution of wages earned and the distribution of wage offers.

Data
Integrated Database for Labour Market Research (IDA), matched employer-employee data
Key variables
  • Outcome: job separations (stayers one year later) by establishment
  • Establishment average hourly wage (Statistics Denmark hourly wage estimate)
  • Wage offer distribution weighted by hires from non-employment
  • Wage earned distribution weighted by establishment employment
  • Sub-samples by occupation: skilled, unskilled, managers, salaried
Period
November 1994–November 1995
Sample
113,332 private-sector establishments All establishments in the Danish private sector, with workers aged 18–65, split by occupational category. source

Labour markets, wages and sorting

Journal of Public Economics

The leading field journal in public economics.

Sick of Your Poor Neighborhood? Quasi-Experimental Evidence on Neighborhood Effects on Health

Linea Hasager and Mia Jørgensen · Journal of Public Economics, 2026 · Individual

Uses the quasi-random dispersal of refugees across Danish neighbourhoods from 1986 to 1998. Refugees placed in low-income neighbourhoods had a 12 percent higher risk of developing a lifestyle-related disease 8 to 15 years later, driven by neighbours and the local environment rather than health care access, ethnic networks or labour market outcomes.

Data
National Patient Register (LPR), Health Insurance Register (SYSI, SSSY), Integrated Database for Labour Market Research (IDA), Income register (IND), Population register (BEF) and address/mobility registers (BEFBOP, BEFADR), Migration register (VNDS), Criminal convictions register (KRAF), O*NET occupational data merged via occupation codes
Key variables
  • Treatment: assignment to a bottom- vs top-income-third parish (neighbourhood median household disposable income) under the 1986–1998 Refugee Spatial Dispersal Policy
  • Outcome: lifestyle-related disease diagnosis (circulatory, nutritional/metabolic, COPD, hip arthrosis, alcohol-related) 2–15 and 8–15 years after immigration
  • Outcome: mental disorder diagnoses
  • Mechanisms: health care access, employment and earnings, neighbour characteristics
Period
1985–2017 (refugees arriving 1986–1998)
Sample
21,965 refugees Refugees aged 18–64 at arrival from nine refugee-sending countries who arrived in Denmark in 1986–1998 and were assigned a municipality under the dispersal policy (excluding family-reunified spouses). source

Health Migration, neighbourhoods and refugees Inequality and fairness

Joint Retirement of Couples: Evidence from Discontinuities in Denmark

Esteban García-Miralles and Jonathan M. Leganza · Journal of Public Economics, 2024 · Individual

Uses age discontinuities in eligibility for Danish early retirement and public pensions to show that when one spouse becomes eligible and retires, the other spouse is substantially more likely to retire as well, quantifying spillovers that matter for evaluating retirement reforms.

Data
Danish administrative registers for the full population 1986–2014 (labour market outcomes, pension benefits, socio-demographics, family/couple links), Annual taxable earnings registers, Monthly earnings records for all employees (eIndkomst/BFL) and monthly pension benefit records, from 2008, Voluntary early retirement pension (VERP) contribution records
Key variables
  • Outcome: spouse's retirement (ceasing to earn labour income)
  • Outcome: pension claiming (VERP or OAP) and annual labour earnings
  • Running variable (age-based design): reference individual's age relative to early pension eligibility age 60
  • Running variable (reform-based design): birth date relative to 1 January 1954 cutoff of the 2011 reform raising VERP eligibility age by 6 months
Period
1986–2014 (age-based design 1991–2013; reform-based design 2008–2014)
Sample
367,585 couples and 2,206,044 couple-year observations (age-based sample); 10,321 couples and 73,395 couple-year observations (reform-based sample) Dual-earner Danish couples (married, registered partners or cohabiting) up to 8 years apart in age, with the reference individual aged 57–60, excluding self-employed and disability recipients. source

Labour markets, wages and sorting Family responses and insurance

Does Granting Refugee Status to Family-Reunified Women Improve Their Integration?

Linea Hasager · Journal of Public Economics, 2024 · Individual

Women who enter Denmark through family reunification usually hold permits that depend on staying married. Granting them independent refugee status improves their economic integration, raises divorce rates and lowers the risk of violence against them, consistent with reduced residency uncertainty and greater bargaining power.

Data
Admission register on immigrant status and residence permit application/approval dates (Danish Immigration Service data via Statistics Denmark), Labour market data from the Danish tax authorities (employment; hours and earnings from 2008), Police registers on victimisation and criminal convictions, Hospital admissions data (National Patient Register) for assault injuries, Central population register (BEF) for demographics, spouse links and divorce
Key variables
  • Treatment: family-reunified woman granted her own refugee status (asylum), staggered timing
  • Outcome: quarterly employment, hours of work and earnings
  • Outcome: victimisation of violence (police records or assault-related hospitalisation)
  • Outcome: divorce
  • Design: staggered difference-in-differences with not-yet-treated women as controls
Period
2001–2019 (hours and earnings from 2008)
Sample
1,349 adult women Women aged 18+ who were family-reunified to a refugee spouse in Denmark between 2001 and 2017 and later applied for and obtained their own refugee status. source

Migration, neighbourhoods and refugees Gender and the family Family responses and insurance

Income Effects and Labour Supply: Evidence from a Child Benefits Reform

Mathias Fjællegaard Jensen and Jack Blundell · Journal of Public Economics, 2024 · Individual

A 2011 Danish cap on child benefits cut payments to families with several young children and left smaller families unaffected. Mothers' labour supply rises substantially after the cut, mainly on the extensive margin, and sterilisation records are used to control for differences in preferences for more children.

Data
Population register (BEF) for family composition, marital status and cohabitation, Monthly payroll records with hours worked (BFL/eIndkomst), Child benefit payment records (BOBO/BOTI), Register OF (monthly demographics and parental leave status), Sterilisation consultations from the National Patient Register (LPRADM) and health insurance service registers (SYSI, SSSY), Annual income register (IND) for self-employment robustness
Key variables
  • Treatment: 2011 cap on child benefits (DKK 35,000) reducing unearned income for larger families with young children
  • Outcome: monthly hours worked (intensive and extensive margins)
  • Outcome: annual earnings (robustness incl. self-employed)
  • Control/restriction: family sterilisation consultation before the reform
  • Design: difference-in-differences, treated vs unaffected families
Period
September 2008–December 2014 (monthly)
Sample
28,968 treated women and 22,477 treated men Native Danish married or cohabiting parents aged 25–59 over the window with 2–4 children (at least two under 18) in January 2011, not self-employed, observed in a balanced monthly panel. source

Family responses and insurance Labour markets, wages and sorting Gender and the family

The Division of Parental Leave: Empirical Evidence and Policy Design

Thomas Høgholm Jørgensen and Jakob Egholt Søgaard · Journal of Public Economics, 2024 · Individual

Uses sharp incentives in the Danish parental leave benefit system for about 190,000 births to estimate parents' willingness to pay for leave. Parents bunch at kinks and are willing to pay for a traditional split with little leave for fathers, and simulations show that earmarked leave works much better when combined with high replacement rates.

Data
Parental leave benefit spell data (parents of children born 2008–2015), incl. benefits paid to parent or employer, Monthly earnings records for all employees (BFL/eIndkomst), from 2008, Danish administrative registers on demographics, family links and firm links (population and labour market registers)
Key variables
  • Outcome: weeks of parental leave taken by mother and father within three years of birth
  • Incentive: individual benefit replacement rates and benefit cap creating kinks in the household budget set
  • Incentive: employer-provided full wage compensation (from benefits paid to employer)
  • Policy: earmarked (father quota) leave and replacement rate counterfactuals in a structural model
Period
Births 2008–2015
Sample
189,974 births Births 2008–2015 to parents in stable employment and not on non-birth public benefits in the three months before birth, excluding births followed by another child within 15 months. source

Gender and the family Family responses and insurance Taxation and public finance

Estimating Labor Supply Responses to Danish Tax Reforms

Hans Schytte Sigaard · Journal of Public Economics, 2023 · Individual

Applies taxable income elasticity methods to register data on hours actually worked. The intensive-margin labour supply elasticity is about 0.08, close to the labour income and taxable income elasticities, and it comes from changes in contract hours, paid absence and switches between main and secondary jobs.

Data
Wage Statistics Register (Lønstatistikken, LON) for performed hours of work, Integrated Database for Labour Market Research (IDAN) for workplace controls, Income registers (IND, INDK, INPI) for marginal tax rate simulation, Population register (BEF) and family income register (FAIN), Family register (FAMILIE), Education register (UDDA), Danish tax simulation programs (Kleven and Schultz 2014, extended by the Ministry of Finance)
Key variables
  • Outcome: three-year log change in annual performed hours of work
  • Treatment: three-year log change in the marginal net-of-tax rate on labour income
  • Instrument: mechanical (simulated) change in marginal tax rate from tax reforms, using lagged income
  • Secondary outcomes: labour income and taxable income
  • Controls: income splines, socio-economic and municipality controls
Period
2002–2016
Sample
10,755,733 observations Employed wage earners aged 25–65 covered by the Wage Statistics Register with positive hours in both years of each three-year difference and base-year labour income above DKK 250,000. source

Taxation and public finance Labour markets, wages and sorting

Intergenerational Spillover Effects of Language Training for Refugees

Mette Foged, Linea Hasager, Giovanni Peri, Jacob Nielsen Arendt and Iben Bolvig · Journal of Public Economics, 2023 · Individual

Follows the children of refugees affected by the 1999 Danish reform that improved language training. Children of treated parents achieve better educational outcomes, showing that the integration gains from language training carry over to the next generation.

Data
Danish administrative registers from Statistics Denmark on refugees' asylum/admission dates and parent–child links, Lower secondary school completion and final exam records, Criminal conviction records (property, violent, narcotics crime), Earnings, occupation (ISCO), disposable income, marriage and fertility registers for parents
Key variables
  • Running variable: parent's admission (asylum grant) date relative to 1 January 1999 (Integration Act language training reform)
  • Outcome: completing lower secondary school and taking final exams by age 18
  • Outcome: criminal convictions between ages 15 and 18
  • Parental outcomes: annual earnings, complex job, disposable income, convictions
Period
Children born 1990–2001, followed up to 2019; parental outcomes 1999–2016
Sample
6,467 children; 5,197 adult parents Children born 1990–2001 with at least one parent granted asylum in Denmark within a four-year window around 1 January 1999, who arrived before or during primary school age. source

Migration, neighbourhoods and refugees Children, intergenerational mobility and skills Education

The Disparate Effects of Information Provision: A Field Experiment on the Work Incentives of Social Welfare

Sofie Cairo and Robert Mahlstedt · Journal of Public Economics, 2023 · Individual

A field experiment in Denmark informed welfare recipients about a minimum work requirement, either with personalised running counts of their hours or with generic rules. Personalised information raised employment among those below the required hours, while generic notices reduced labour supply among those at low near-term risk of sanctions.

Data
Field experiment assignment and messaging data (Danish public employment service, jobnet.dk online tool), Population registers (socio-demographic background), Benefit payment records (DREAM), Monthly income and employment records (eIndkomst/BFL), Public employment service data on sanctions, exemptions, collected working hours, click data and registered job applications
Key variables
  • Treatment: random assignment to personalised online information tool about benefit-reduction risk under the work requirement (three arms)
  • Outcome: employment and earnings
  • Outcome: welfare benefit receipt and exit to alternative income support
  • Outcome: working hours collected toward the requirement and job applications
  • Heterogeneity: job search activity and sanction risk
Period
Intervention from 15 August 2018 with up to five monthly reminders
Sample
47,294 individuals All Danish welfare benefit recipients on 15 August 2018 subject to the 225-hour work requirement who had received the official notification letter. source

Labour markets, wages and sorting Taxation and public finance

Identifying Behavioral Responses to Tax Reforms: New Insights and a New Approach

Katrine Jakobsen and Jakob Egholt Søgaard · Journal of Public Economics, 2022 · Individual

Shows that standard estimates of taxable income elasticities from tax reforms are biased by mean reversion and diverging income trends across the distribution, and proposes an approach that exploits reform timing to separate behavioural responses from these trends, applied to Danish tax reforms.

Data
Danish administrative registers for the full population since 1980 (labour market history, education, earnings, demographics), Third-party reported income tax records, Simulated marginal tax rates from an extended Danish tax simulator (Kleven and Schultz 2014 model)
Key variables
  • Outcome: changes in taxable income (broad, personal, labour income) over four-year periods
  • Treatment: predicted change in log net-of-tax rate from the 2004 and 2009–10 Danish tax reforms
  • Income-bin dummies capturing trend differentials across the income distribution
  • Validation: income trends in parts of the distribution unaffected by the reform
Period
Data since 1980; main analyses 1999–2012 (2004 reform: 1999–2003 pre-period, 2003–2007 reform period; 2009–10 reform: 2004–2008 pre-period, 2008–2012 reform period); 1987 and 1994 reforms in appendix
Sample
over 2,000,000 individuals per period (2,240,332 and 2,295,922 for the 2004 reform pre-reform and reform periods; 2,097,862 and 2,240,833 for the 2009–10 reform) Individuals present in the tax data with positive income over each four-year period and initial personal income above DKK 200,000 (2004 reform) or DKK 250,000 (2009–10 reform), about half the Danish adult population. source

Taxation and public finance Measurement and methods

Spot Price Biases in Non-Linear Health Insurance Contracts

Marianne Simonsen, Lars Skipper, Niels Skipper and Anne Illemann Christensen · Journal of Public Economics, 2021 · Individual

The Danish prescription drug reimbursement scheme has coverage that rises with annual spending and resets each year. Consumers look forward-looking around the reset but react too strongly to current prices within the year, and liquidity constraints rather than plan literacy or cognitive decline explain the spot-price bias.

Data
Population-wide individual data on prescription drug purchases and reimbursement under the Danish non-linear drug insurance scheme (registers not named in the abstract)
Key variables
  • Incentive: spot price of drugs as a non-linear function of year-to-date spending
  • Incentive: end-of-year reset of the coverage (deductible) year
  • Outcome: timing and amount of prescription drug purchases
  • Heterogeneity: liquidity constraints, plan literacy, cognitive decline
Period
Not stated in the sources checked
Sample
Not stated in the sources checked Population-wide data on Danish consumers of prescription drugs covered by the non-linear reimbursement scheme (details not available from the abstract). source (abstract)

Health Household finance, saving and consumption

Home Prices, Fertility, and Early-Life Health Outcomes

N. Meltem Daysal, Michael Lovenheim, Nikolaj Siersbæk and David N. Wasser · Journal of Public Economics, 2021 · Individual

For Danish homeowners aged 20 to 44, a 100,000 kroner rise in home prices raises the probability of giving birth by about 2.35 percent. Birth outcomes improve too, but mostly because of who gives birth, and there is no effect on children's health in the first five years.

Data
Medical Birth Register (MFR), National Patient Register (LPR), State's Sales and Valuation Registry (public property valuations and sales prices), Population register (BEF) and other registers for demographics, education, household income and partner status
Key variables
  • Treatment: once-lagged one-year change in estimated home value (public valuation adjusted by local sale-price ratio)
  • Outcome: indicator for giving birth
  • Outcomes: birth weight, low birth weight, very low birth weight, prematurity
  • Outcomes: hospital admissions, ER visits and days hospitalised in first year and ages 1–5
  • Comparison group: renters
Period
1992–2011 (fertility analysis 1995–2006)
Sample
1,105,559 observations on 198,435 women (125,903 births) Women aged 20–44 who became first-time homeowners between 1993 and 2004, purchasing between ages 18 and 42. source

Housing Family responses and insurance Health Children, intergenerational mobility and skills

Labor Supply and Optimization Frictions: Evidence from the Danish Student Labor Market

Jakob Egholt Søgaard · Journal of Public Economics, 2019 · Individual

Danish students lose part of their study grant when annual earnings exceed a threshold. Register data show bunching below the threshold that grows as students gain experience with the rule, so optimisation frictions hide a structural elasticity well above the observed response.

Data
Danish administrative registers for the full population (education, earnings, benefits, demographics), Annual income tax returns, Monthly student benefit (SU) take-up records from the Student Benefit Administration, Monthly payroll records of earnings and hours (BFL/eIndkomst), from 2008
Key variables
  • Outcome: annual labour earnings relative to the student benefit income limit (bunching)
  • Incentive: kink/notch from phase-out (payback) of student grants above the individual income limit
  • Simulated individual marginal tax and phase-out rates
  • Monthly earnings and benefit take-up (timing of adjustment)
Period
2006–2011 (monthly earnings from 2008)
Sample
around 75,000 observations per year (core sample 75,500 individuals per year on average) Individuals aged 18–35 enrolled in tertiary education, fully eligible for student benefits and with positive labour earnings (above DKK 8,000 per year). source

Taxation and public finance Labour markets, wages and sorting Education

Spillovers in Education Choice

Juanna Schrøter Joensen and Helena Skyt Nielsen · Journal of Public Economics, 2018 · Individual

Exploits the Danish high school pilot that made advanced mathematics cheaper to take for some cohorts. An older sibling's advanced maths choice raises the probability that the younger sibling also chooses advanced maths, with spillovers that depend on the siblings' gender composition.

Data
Danish administrative registers on high school enrolment, course packages and completion (Statistics Denmark education registers), Parent and sibling links from population registers, Parental education and income registers, Earnings registers (younger siblings' earnings at ages 30–35)
Key variables
  • Outcome: younger sibling chooses advanced math-science course package in high school
  • Endogenous regressor: older sibling's advanced math-science choice
  • Instrument: older sibling enrolled in a high school that unexpectedly introduced the pilot scheme (PilotIntro)
  • Outcomes: younger sibling's college/STEM education at age 30 and log earnings at ages 30–35
  • Controls: parental education and income, county and entry-cohort fixed effects
Period
High school entry cohorts 1984–1987 (older siblings) and 1988–1991 (younger siblings, main sample); register data from 1980 onwards
Sample
7,786 sibling pairs (main closely spaced sample); 17,691 sibling pairs in the wider sample with age gap < 10 years Older siblings entering academic high school 1984–1987 who graduated in three years, paired with younger siblings entering high school 1988–1991 with an age gap of at most 4 years. source

Education Family responses and insurance Children, intergenerational mobility and skills

Parental Responses to Child Support Obligations: Evidence from Administrative Data

Maya Rossin-Slater and Miriam Wüst · Journal of Public Economics, 2018 · Individual

Uses discontinuities in the Danish child support schedule by fathers' income to estimate how higher obligations affect separated parents. The paper documents responses in fathers' income, subsequent family formation and the parents' living arrangements.

Data
Danish administrative registers on children born 1985–2008 linked to parents and siblings (population/family registers), Income and tax records including tax-deductible child support payments, Labour market registers (employment, earnings, disability insurance, early retirement), Birth records (fertility through 2010), Education registers, Danish Longitudinal Survey of Children (DALSC) and Children and Youth in Denmark (CYD) survey (descriptive, supplementary)
Key variables
  • Treatment: father's average child support obligation (from Danish child support guideline schedule)
  • Identifying variation: income thresholds in the child support guidelines (simulated instrument)
  • Outcome: father's annual child support payment
  • Outcome: father–child co-residence (physical custody)
  • Outcomes: post-separation fertility and labour supply of both parents
Period
1998–2010 (separation years 1999–2008)
Sample
73,303 fathers (71,575 unique mothers) Fathers observed every year 1998–2010 who separated from their oldest child's mother (or had a first child while not cohabiting) in 1999–2008, with one or two children under 18 and separation-year income near the first three guideline thresholds. source

Family responses and insurance Children, intergenerational mobility and skills Labour markets, wages and sorting

Taxation and the Long Run Allocation of Labor: Theory and Danish Evidence

Claus Thustrup Kreiner, Jakob Roland Munch and Hans Jørgen Whitta-Jacobsen · Journal of Public Economics, 2015 · Individual + firm

Estimates a search model with non-linear taxation, in which workers keep looking for better-paid jobs, on employer-employee register data for all Danish workers and workplaces in 2004 to 2006. Danish taxes reduce total income by about 12 percent through the allocation of labour across jobs, and moving to low-tax OECD levels would recover four fifths of the loss.

Data
Integrated Database for Labour Market Research (IDA), Wage Statistics Register (Lønstatistikken) for hours-adjusted wages (robustness), Empirical effective marginal tax rate schedule for 2006 from Kleven and Kreiner (2006)
Key variables
  • Workplace average hourly wage rate (annual labour income / annual hours)
  • Workplace size, number of stayers and new hires (job-to-job flows)
  • New hires from non-employment
  • Effective marginal tax rates by income level (used to estimate structural search model and efficiency loss)
Period
2004–2006 (base year 2005)
Sample
126,400 workplaces employing 1.4 million workers Full population of private-sector workplaces in Denmark in 2005 and their workers aged 18–65, with wages between DKK 90 and DKK 714 per hour. source

Taxation and public finance Labour markets, wages and sorting

Tax Bunching, Income Shifting and Self-Employment

Daniel le Maire and Bertel Schjerning · Journal of Public Economics, 2013 · Individual

Self-employed Danes bunch sharply at the top tax kink, but much of the bunching reflects intertemporal shifting of income through retained earnings in the business rather than real changes in effort. Accounting for shifting implies a much smaller elasticity of real income.

Data
Tax records of Danish self-employed individuals (taxable income, retained earnings)
Key variables
  • Outcome: bunching of taxable income at kinks of the tax schedule
  • Mechanism: intertemporal income shifting via retained earnings in the business tax schemes
  • Estimate: taxable income elasticity (0.43–0.53 ignoring shifting; structural 0.14–0.20)
Period
Not stated in the sources checked
Sample
Not stated in the sources checked Danish self-employed taxpayers. source (abstract)

Taxation and public finance Firms, ownership and innovation

Non-cognitive Child Outcomes and Universal High Quality Child Care

Nabanita Datta Gupta and Marianne Simonsen · Journal of Public Economics, 2010 · Individual

Links the Danish Longitudinal Survey of Children to the registers to compare non-cognitive outcomes at age seven for children in universal preschool, family day care and home care at age three. Attending high-quality preschool does not harm non-cognitive outcomes relative to home care, while long hours in family day care are associated with worse outcomes for some groups.

Data
Danish Longitudinal Survey of Children (DALSC), waves 1996, 1999, 2003, Administrative registers on parents' education, labour market status, hours, wages and income (1994–2003), Day Care Register (Statistics Denmark), used descriptively
Key variables
  • Outcome: Strengths and Difficulties Questionnaire (SDQ) index at age 7½
  • Treatment: mode of care at age 3½ (preschool, family day care, home care)
  • Instrument/pseudo-experiment: municipality differences in childcare take-up and provision
  • Heterogeneity: child gender and mother's education
  • Hours in non-parental care
Period
1994–2003 (children born 1995; care measured 1999, outcomes 2003)
Sample
4,343 observations (children) in the main OLS estimates About 6,000 Danish children born between 15 September and 31 October 1995 surveyed in DALSC, linked to parental register data. source

Children, intergenerational mobility and skills Education

How to Help Unemployed Find Jobs Quickly: Experimental Evidence from a Mandatory Activation Program

Brian Krogh Graversen and Jan C. van Ours · Journal of Public Economics, 2008 · Individual

A randomised experiment in two Danish counties assigned newly unemployed workers to an intensive activation programme with early job search courses, frequent meetings and mandatory activation. Treated workers found jobs substantially faster, with the threat of mandatory activation an important part of the effect.

Data
Public Employment Service (PES) administrative registers (treatment status, demographics, meetings with caseworkers), DREAM weekly register of public income transfers (Danish National Labour Market Authority)
Key variables
  • Outcome: unemployment duration in weeks / job finding rate
  • Treatment: random assignment to mandatory activation programme by birth date (born 1st–15th of month)
  • Mechanism: meetings with caseworkers, job search programmes, training programmes
  • Exit states: employment, other benefits, right-censoring
Period
November 2005–mid September 2006
Sample
4,520 unemployment spells (2,229 treatment, 2,291 control) Newly unemployed UI benefit recipients registering at the PES in Storstrøm and South Jutland counties between November 2005 and February 2006, first spell only. source

Labour markets, wages and sorting

Public Pension Programmes and the Retirement of Married Couples in Denmark

Paul Bingley and Gauthier Lanot · Journal of Public Economics, 2007 · Individual

Estimates a dynamic discrete choice model of couples' joint retirement and saving on a 1 percent register sample of Danish couples, using the introduction and reforms of the early retirement programme (efterløn) for identification. Retirement responds asymmetrically for men and women to their own and their spouse's income flows.

Data
1% sample of Danish couples of potential retirement age from an administrative register
Key variables
  • Outcome: retirement decisions of husband and wife (joint retirement)
  • Identifying variation: introduction and subsequent reforms of the publicly financed early retirement programme (efterløn)
  • Explanatory: own and spouse's income flows
  • Model: dynamic discrete choice model with saving
Period
Not stated in the sources checked
Sample
Not stated in the sources checked A 1% register sample of Danish married couples of potential retirement age. source (abstract)

Labour markets, wages and sorting Family responses and insurance Taxation and public finance

Rent Control and Unemployment Duration

Michael Svarer, Michael Rosholm and Jakob Roland Munch · Journal of Public Economics, 2005 · Individual

Uses Danish register data on unemployment spells and housing to study whether living in rent-controlled housing affects job finding. Unemployed workers in rent-controlled dwellings have lower exit rates from unemployment, consistent with rent control reducing geographic mobility.

Data
10% random sample of the Danish adult population from administrative registers (Statistics Denmark), Housing unit characteristics for dwellings occupied by the sample, Weekly labour market event histories, Danish Tax Authorities 1999 hedonic model for owner-occupied housing (to predict uncontrolled rent)
Key variables
  • Outcome: unemployment duration in weeks (exit to job in local vs national labour market)
  • Explanatory: rent control benefit decile (predicted uncontrolled rent minus actual rent), time-varying
  • Mobility: job finding with move to another of 51 commuting areas
  • Tenure type: private rental housing vs other
Period
1997–2000
Sample
14,645 persons contributing 31,966 unemployment spells Inflow sample of unemployment spells 1997–2000 from a 10% random sample of the Danish adult population (IZA DP 842 working-paper version). source

Housing Labour markets, wages and sorting