We exploit rules of class formation to identify the causal effect of increasing the number of immigrants in a classroom on natives test scores, keeping class size constant (Pure Composition Effect). We explain why this is a relevant policy parameter although it has been neglected so far. We show...

We exploit rules of class formation to identify the causal effect of increasing the number of immigrants in a classroom on natives test scores, keeping class size constant (Pure Composition Effect). We explain why this is a relevant policy parameter although it has been neglected so far. We show...

We provide, calibrate and test a realistic model of the spread of SARS-Cov-2 in an economy with different risks related to age and sectors. The model considers hospital congestion and response of individuals adjusting their behavior to the virus' spread. We measure precisely the size of these...

We study the labor supply effects of a change in child-subsidy policy designed to both increase fertility and shorten birth-related employment interruptions. The reform yields most of the intended effects.

We study the labor supply effects of a major change in child-subsidy policy in Germany in 2007 designed to both increase fertility and shorten birth-related employment interruptions. The reform involved a move from a means-tested maternity leave benefit system that paid a maximum of 300 Euro for...

German family policy underwent a reform in 2007, when the new instrument of "Elterngeld" replaced the previous "Erziehungsgeld". The transfer programs differ in various dimensions. We study the effects on the labor supply of young mothers, by comparing behavior before and after the reform. We...