Official homepage

TrygFonden's Centre for Child Research

Labour Economics







Welcome to the research page of
Helena Skyt Nielsen (pic1, pic2)

Research in progress or under review

  • Consequences of ADHD Medication Use for Children’s Outcomes (with S. Dalsgaard and M. Simonsen). R&R Journal of Health Economics.
  • Playing the Fertility Game at Work (with F. Ciliberto, A. Miller and M. Simonsen). Download.
  • School Starting Age and Crime (with R. Landersø and M. Simonsen) Download.
  • Math and Gender: Heterogeneity in Causes and Consequences of Math (with J. S. Joensen) Download. R&R Economic Journal.
  • Peer Effects in Math and Science (with J. S. Joensen)
  • More Successful because of Math (with J. S. Joensen)
  • The Effect of Economic Incentives on a Father's Child Leave: Evidence from a Reform of Leave Schemes Download.
  • The Impact of Labor Income Risk on Educational Choices: Estimates and Implied Risk Aversion (with A. Vissing-Jørgensen) Download.


  • Eriksen, T. L. M., H. S. Nielsen and M. Simonsen, Bullying in Elementary School. Forthcoming in Journal of Human Resources.
  • Dalsgaard, S., H. S. Nielsen and M. Simonsen (2013), Common Danish standards in prescribing medication for children and adolescents with ADHD. European Child & Adolescent Psychiatry 12:2013.
  • Dalsgaard, S., H. S. Nielsen, J. Leckman and M. Simonsen (2013), Five-fold increase in national prevalence rates of ADHD medications for children and adolescents with Autism Spectrum Disorder, Attention-Deficit/Hyperactivity Disorder and other psychiatric disorders – A Danish register-based study. Journal of Child and Adolescent Psychopharmacology 23(7): 432-9.
  • Kvist, A. P., H. S. Nielsen and M. Simonsen (2013), The Importance of Children’s ADHD for Parents’ Relationship Stability and Labor Supply. Social Science and Medicine 88: 30-38.
  • Nielsen, H. S. and B. S. Rangvid (2012), The Impact of Parents’ Years since Migration on Children’s Academic Achievement. IZA Journal of Migration 1(6).
  • Dalsgaard, S., M. K. Humlum, H. S. Nielsen and M. Simonsen (2012), Relative Standards in ADHD Diagnoses: The Role of Specialist Behavior. Economics Letters 117: 663-665.
  • Humlum, M. K., K. Kleinjans and H. S. Nielsen (2012), An Economic Analysis of Identity and Career Choice. Economic Inquiry 50: 39-61.
  • Nielsen, H. S., T. Sørensen and C. Taber (2010), Estimating the Effect of Student Aid on College Enrollment: Evidence from a Government Grant Policy Reform. American Economic Journal: Economic Policy 2: 185-215.
  • Blume, K., M. Ejrnæs, H. S. Nielsen and A. Würtz (2009), Labour Market Transitions of Immigrants with Emphasis on Self-employment and Marginalization. Journal of Population Economics 22: 881-908.
  • Nielsen, H. S. and M. Svarer (2009), Educational Homogamy: How much is Opportunities? Journal of Human Resources 44: 1066-86.
  • Nielsen, H. S., N. Smith and A. Celikaksoy (2009), The Effect of Marriage on Education of Immigrants: Evidence from a Policy Reform Restricting Marriage Migration. Scandinavian Journal of Economics 111: 459-488.
  • Joensen, J. S. and H. S. Nielsen (2009), Is there a Causal Effect of High School Math on Labor Market Outcomes? Journal of Human Resources 44: 171-198.
  • Diaz-Serrano, L., J. Hartog and H. S. Nielsen (2008), Compensating Wage Differentials for Schooling Risk in Denmark. Scandinavian Journal of Economics 110: 711-731.
  • Christiansen, C., J. Joensen, and H. S. Nielsen (2007), The Risk-Return Trade-off in Human Capital Investment. Labour Economics 14: 971-986.
  • Rosholm, M., H. S. Nielsen and A. Dabalen (2007), Evaluation of Training in African Enterprises.  Journal of Development Economics 84: 310-329.
  • Celikaksoy, A., H. S. Nielsen and M. Verner (2006), Marriage Migration: Just Another Case of Positive Assortative Matching? Review of Economics of the Household 3: 253-275.
  • Nielsen, H. S. and M. Verner (2006), Why are Well-educated Women not Full-Timers? Danish Economic Journal 144: 43-74.
  • Nielsen, H. S., M. Simonsen and M. Verner (2004), Does the Gap in Family-friendly Policies Drive the Family Gap?  Scandinavian Journal of Economics 26: 721-744.
  • Nielsen, H. S., M. Rosholm, N. Smith and L. Husted (2004), Qualifications, Discrimination, or Assimilation? An Extended Framework for Analysing Immigrant Wage Gaps. Empirical Economics 29: 855-883. 
  • Nielsen, H. S., M. Rosholm, N. Smith and L. Husted (2003), Intergenerational Transmission and the School-to-work Transition for 2nd Generation Immigrants. Journal of Population Economics 16: 755-786.
  • Rosholm, M., L. Husted og H.S. Nielsen (2002), Integration over generationer? Andengenerationsindvandrernes uddannelse. (Integration over Generations: The Education of 2nd Generation Immigrants),  Nationaløkonomisk Tidsskrift 140: 35-58.
  • Nielsen, H.S. and A. Dubey (2002), Child Labor: A Microeconomic Perspective. Indian Journal of Labour Economics 45:479-96. Download.
  • Bevelander, P. and H.S. Nielsen (2001), Declining Employment Assimilation of Immigrants in Sweden: Observed or Unobserved Characteristics. Journal of Population Economics 14: 455-471. Also published in A. Constant and K. Zimmerman, eds., (2004) How labor migrants fare. Springer Verlag. Download decomlogit.ado decomlogit.hlp.
  • Husted, L., H. S. Nielsen, M. Rosholm and N. Smith (2001), Employment and Wage Assimilation of Male First Generation Immigrants in Denmark. International Journal of Manpower 22: 39-68.
  • Nielsen, H. S. and N. Westergård-Nielsen (2001), Returns to Schooling in Less Developed Countries: New Evidence from Zambia. Economic Development and Cultural Change 49: 365-394.
  • Nielsen, H. S. and M. Rosholm (2001), The Public-Private Sector Wage Gap in Zambia in the 1990s: A Quantile Regression Approach. Empirical Economics 26: 169-182. Also published in B. Fitzenberger, R. Koenker and J. A. Machado, eds., Economic Applications of Quantile Regression. Physica Verlag, Heidelberg, Germany.
  • Nielsen, H. S. (2001), How Sensitive is the Demand for Primary Education to Changes in Economic Factors? Journal of African Economies 10: 191-218.
  • Canagarajah, S. and H. S. Nielsen (2001), Child Labor in Africa: A Comparative Study. Annals of the American Academy of Political and Social Science 575: 71-91.
  • Canagarajah, S. and H. S. Nielsen, eds., (2001), Child Labor and Schooling in Africa: A Case Study of Ghana, Tanzania, Cote d'Ivoire and Zambia, HDNet, World Bank: Washington D.C.
  • Nielsen, H. S. (2000), Wage Discrimination in Zambia: An Extension of the Oaxaca-Blinder Decomposition. Applied Economics Letters 7: 405-408.
  • Nielsen, H. S. (1999), Investment in Human Capital in Zambia. Ph.D.-thesis 1999-3. University of Aarhus, Denmark.
  • Nielsen, H. S. (1998), Discrimination and Detailed Decomposition in a Logit Model. Economics Letters 61: 115-120. Download decomlogit.ado decomlogit.hlp.
  • Jensen, P. and H. S. Nielsen (1997), Child Labour or School Attendance? Evidence from Zambia. Journal of Population Economics 10: 407-24.