We conduct experiments in which subjects participate in both a game that measures preferences for income equality and a public goods game involving costly punishment. The results indicate that individuals who care about equality are those who are most willing to punish free-riders in public...

How did human cooperation evolve? Recent evidence shows that many people are willing to engage in altruistic punishment, voluntarily paying a cost to punish noncooperators. While this behaviour helps to explain how cooperation can persist, it creates an important puzzle. If altruistic punishment...

Altruistic punishment is a behaviour in which individuals punish others at a cost to themselves in order to provide a public good. Fehr and Gächter1 present experimental evidence suggesting that negative emotions toward non-cooperators motivate punishment which, in turn, facilitates high levels...