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Zusammenfassung:
Most experiments comparing individual and group behavior find that groups behave more egoistically than individuals. However, most of these studies do not control for the influence of the within-group decision making mechanism which might have an important impact on group behavior. In this paper, we report first results of laboratory experiments comparing individual and group behavior in a public goods game. Groups decide by majority rule. We find that cooperation levels do not differ between groups and individuals. The median player is the most influential group member. We can show that the institutional incentives set by majority rule dominate psychological traits which presumably lead to more selfish group behavior in other experimental settings.
