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...

The Danish labour market has undergone a remarkable change during the 1990s with a reduction of the unemployment rate from about 12 per cent in 1993 to less than 6 per cent at the turn of the century. This reflects both a turn in the business cycle but also structural changes related to shifts...

We model the correlations of brothers' life-cycle earnings separating for the first time the effect of paternal earnings from additional residual sibling effects. We identify the two effects by analysing sibling correlations and intergenerational correlations jointly within a unified framework....