Throughout human history, informal sanctions by peers were ubiquitous and played a key role in the enforcement of social norms and the provision of public goods. However, a considerable body of evidence suggests that informal peer sanctions cause large collateral damage and efficiency costs....

Throughout human history, informal sanctions by peers were ubiquitous and played a key role in the enforcement of social norms and the provision of public goods. However, a considerable body of evidence suggests that informal peer sanctions cause large collateral damage and efficiency costs....

Corruption is a widespread phenomenon. Nevertheless, causal evidence on the effects of corruption is still lacking. In this paper, we assess whether and how corruption affects cooperation using a public good game experiment. Overall, contributions to the public good are reduced by 30% when...