I investigate causal machine learning (CML) methods to estimate effect heterogeneity by means of conditional average treatment effects (CATEs). In particular, I study whether the estimated effect heterogeneity can provide evidence for the theoretical labour supply predictions of Connecticut's...

This paper analyses the effects of EU regional policy transfer payments on net migration flows among the EU-28 countries. The hypothesis is tested that EU transfer payments do hamper internal migration across the EU. On the one hand, this is done by reestimating the results found by Egger,...