We investigate the finite sample properties of a large number of estimators for the average treatment effect on the treated that are suitable when adjustment for observable covariates is required, like inverse probability weighting, kernel and other variants of matching, as well as different...

Wage subsidies are often suggested as a particularly effective policy to improve labor market chances of economically disadvantaged groups. We empirically evaluate an employer-side wage subsidy scheme targeted at the long-term unemployed in Germany. Based on program regulations and a large data...

Based on new, exceptionally informative and large German linked employer-employee administrative data, we investigate the question whether the omission of important control variables in matching estimation leads to biased impact estimates of typical active labour market programs for the...