This paper uses Danish register-based data for the population of children born in 1990-1997 to investigate the effects on parents of having a child with attention-deficit/hyperactivity-disorder (ADHD). Ten years after birth, parents of children diagnosed with ADHD have a 75% higher probability...

We investigate the effects of meetings between the unemployed and their case workers on the transition rate from unemployment to employment using detailed Danish event history data obtained from administrative registers. We find large positive effects of meetings. The transition rate strongly...

Bullying is a widespread social phenomenon. We show that both children who are being bullied and children who bully suffer in terms of long-term outcomes. We rely on rich survey and register-based data for children born in a region of Denmark during 1990-1992, which allows us to carefully...

We are the first to investigate longer-term effects of pharmacological treatment of ADHD on children's health. We rely on a difference-in-differences strategy while exploiting Danish register-based panel data for children born in 1990-1999. We study effects of treatment initiated between ages...

Randomized experiments provide policy relevant treatment effects if there are no spillovers between participants and nonparticipants. We show that this assumption is violated for a Danish activation program for unemployed workers. Using a difference-in-difference model we show that the...

In this paper, we employ register data for eight cohorts of second-generation immigrant pupils to identify the impact of each parent's years since migration on their children's school achievements. We exploit local variation in years since migration and within-family variation. We find evidence...