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 tests whether changes in “incidental emotions” lead to changes in economic choices. Incidental emotions are experienced at the time of an economic decision but are not part of the payoff from a particular choice. As such, the standard economic model predicts that incidental...