We consider a voluntary contributions game, in which players may punish others after contributions are made and observed. The productivity of contributions, as captured in the marginal-per-capita return, differs among individuals, so that there are two types: high and low productivity. Every two...

This paper experimentally examines the effect of electoral delegation on providing global public goods shared by several groups. Each group elects a delegate who can freely decide on each group member's contribution (including the contribution of herself) to the global public good. Our results...

This paper investigates how punishment promotes cooperation when the punishment enforcer is independent of its proposer. In a prisoner's dilemma experiment, compared with the case when the implicated parties are allowed to punish each other, cooperation is lower when the enforcement of...

Previous experimental results on one-shot sequential two-player games show that group decisions are closer to the subgame-perfect Nash equilibrium than individual decisions. We extend the analysis of inter-group versus inter-individual decision making by running both one-shot and repeated...