Recent theoretical advances and quasi-experimental evidence from modern conflict areas suggest that intergroup conflict and ostracism play a pivotal role in the evolution of cooperation. However, relatively little is known about the role of intergroup conflict and ostracism on group formation...

We use a laboratory experiment to investigate the extent to which leaders---faced with opportunistic incentives---employ monitoring to improve team production. Participants are assigned to teams, with one person appointed as the leader. The leader has the power to commit to a monitoring option,...

We use a laboratory experiment to investigate the extent to which leaders---faced with opportunistic incentives---employ monitoring to improve team production. Participants are assigned to teams, with one person appointed as the leader. The leader has the power to commit to a monitoring option,...