We estimate the effect of motherhood on wages using matching. We distinguish between net and direct effects. The net effect includes the total wage costs, whereas the direct represents the causal effect. Since covariates are likely affected by motherhood, the latter effect is not immediately...

We shed new light on the effects of having children on hourly wages by exploiting access to data on the entire population of employed same-sex twins in Denmark. Our second contribution is the use of administrative data on absenteeism; the amount of hours off due to holidays and sickness. Our...

We combine matched Danish worker-firm-trade data with detailed individual-worker training data. We find: 1) workers displaced from offshoring firms take up more vocational-training and have a harder time getting re-attached to the labor-force than other displaced workers, and they also exhibit...

Since 1994, unemployed workers in the Danish labour market have participated in active labour market programmes on a large scale. This paper contributes with an assessment of costs and benefits of these programmes. Long-term treatment effects are estimated on a very detailed administrative...

Children with attention-deficit/hyperactivity disorder (ADHD) have much worse long-term outcomes than other children. This paper uses Danish register-based data on children born from 1990 to 1997 to investigate the significance of children's ADHD for parents' outcomes. We observe 172,299 pairs...

Recent papers indicate that children who are relatively old-for-grade have a significantly lower incidence of ADHD diagnosis. We find that this is not the case in Denmark, suggesting that diagnoses are less subjective in a regime where only specialists diagnose.