Asymmetric Enforcement of Cooperation in a Social Dilemma

The imposition of sanctions is one of the most common means of enforcing cooperation in decentralized interactions. Typically, agents are asymmetric in the sense that each has a different sanctioning power. Using a public-good experiment we analyze such a decentralized punishment institution in which agents are asymmetric. The asymmetric punishment institution prevents the decay of cooperation towards the non-cooperative equilibrium level. Strong agents contribute less to the public good, but punish more than weak agents. At the aggregate level, we observe remarkable similarities between outcomes in asymmetric and symmetric punishment institutions.