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The objective of the conference on "Leadership, Altruism, and Social Organization" was to bring researchers together who were interested in exploring the functioning of the nonprofit sector. The conference and this special issue focus on three themes. First, what causes social and...

A great deal of production and consumption behavior takes place in the context of social organizations that seem to fall outside of the traditional paradigm of profit/utility maximization. These organizations are voluntary in nature and rely on contributions from members to achieve their...

We argue that a social norm and the coordination of behavior within social groups can be expressed by a correlated equilibrium. Given a social group structure (a partition of individuals into social groups), we propose four conditions that one may expect of a correlated equilibrium consistent...