Altruism versus Egoism in Human Behavior of Mixed Motives

A BSTRACT . This article begins with the observation that people often cooperate in social dilemmas. Specifically, they may do so either for altruistic reasons or for reasons indirectly linked to self‐interest. Because these competing motivations exist in different contexts, we explore the consequences of the incorporation of altruism in the economic framework in the context of a series of prisoner's dilemma experiments. Our experiments involve...