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Social scientists who study sexual behavior have consistently found that some HIV-infected individuals continue to have unprotected sex with uninfected partners. In this article, we address three questions that stem from this empirical finding. First, what can game theory contribute to the study...
Amartya Sen claims that the standard axioms of rational choice theory are not subject to `internal consistency'. That is, in order to discover whether someone behaves inconsistently or irrationally one must look beyond the choice function to the actors' motivations. This is true. Intentional...
The fluctuations in incomes inherent in rural communities can be attenuated by reciprocal assistance. A model of reciprocal assistance based upon rational action and voluntary participation is presented. Individuals provide assistance only if the costs of so doing are outweighed by the benefits...
This article focuses on the relationship between the costs of norm enforcement and the extent to which such enforcement actually occurs. We predict that as costs increase, sanctioning of deviant behavior is less likely. In addition, however, costs have a positive effect on the strength of...
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