A standard assumption in the economic approach to individual decision making is that people have independent preferences. We study equilibria of the classic common pool resource extraction and public good games when some of the players have negatively interdependent preferences while the...

Strong reciprocity refers to the willingness to sacrifice one's own material self-interest to punish others for opportunistic actions. This propensity provides a decentralized mechanism for the enforcement of social norms, but its extent and persistence poses a theoretical puzzle. Since...