In recent decades, the immigration of workers and refugees to Europe has increased substantially, and the composition of the population in many countries has consequently become much more heterogeneous in terms of ethnic background. If people exhibit in-group bias in the sense of being more...

If people are more altruistic towards their own kind, the increased ethnic heterogeneity resulting from increased immigration to Europe in recent decades will likely lead to reduced support for redistribution among natives. This paper exploits a nationwide program placing refugees in...

Policies and explicit private incentives designed for self-regarding individuals sometimes are less effective or even counterproductive when they diminish altruism, ethical norms and other social preferences. Evidence from 51 experimental studies indicates that this crowding out effect is...