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...

We study whether decentralizing public employment services impacts job finding positively, as is suggested by the classic decentralization theorem, or negatively, as is suggested by political economy considerations. Our difference-in-difference estimates for a German reform in 2012 point to...

The German nursing home industry rapidly grows due to the permanent increase of people in need of long-term care, in particular. At the same time a large share of residents in German nursing homes is in need of social assistance. In a simple spatial competition model we show that the presence of...

From 2014 onwards, Europe has witnessed an unprecedented influx of refugees. We conducted a survey experiment with almost 5,000 university students in Germany in which we randomly shifted the perception of refugees’ education level through information provision. We find that the perceived...

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,...

This paper studies the role of early center-based child care (age 0-3) for the development of a wide range of skills. The identification strategy uses historical variation in regional child care offer rates in Germany to address selection into center based care. While differences in parenting...

There is a strong debate about who should provide care to young children. Governments offer two alternative types of institutions: formal childcare and parental leave. We assess the effectiveness of these two competing institutions in promoting child development by comparing how a major parental...

While recent studies mostly find that attending child care earlier improves the skills of children from low socio-economic and non-native backgrounds in the short-run, it remains unclear whether such positive effects persist. We identify the short- and medium-run effects of early child care...

Can policymakers hire more effective teachers by increasing the relative economic benefits of teaching? We investigate this question by exploiting business cycle conditions at career start as a source of exogenous variation in the outside labor market opportunities of potential teachers. Using...