We study the effect of reducing barriers to accessing non-police services on the demand for police services in cases of police-reported domestic violence. Variation comes from a large randomized controlled trial designed to assist victims in accessing non-police services and we link information...

Explaining the evolution and maintenance of cooperation among unrelated individuals is one of the fundamental problems in biology and the social sciences. Recent experimental evidence suggests that altruistic punishment is an important mechanism to maintain cooperation among humans. In this...

Economic and social interaction takes place between individuals with heterogeneous characteristics. We investigate experimentally the emergence and informal enforcement of different contribution norms to a public good in homogeneous and different heterogeneous groups. When punishment is not...