When members of one group encounter a norm violation committed by a member of another group, this antisocial behavior is often handled by picking a random member of the community to which the perpetrator belongs and by applying sanctions to him/her. Despite its prevalence, this kind of...

In this paper, we test if sanctions applied to an entire group for the free-riding of one of its members can increase the level of cooperation within that group. To measure the efficiency of such collective sanctions, we conducted a lab experiment based on a standard public good game. The...