This paper suggests that a relatively minor, but important generalization of the rational choice approach used in economics and game theory can provide sufficient flexibility, breadth, and realism to be used as the basis for interdisciplinary analysis. Multi-disciplinary analysis does not require abandoning the "rational" choice model of individual decision making worked out over the past century and a half by economists, game theorists, and other users of rational-choice models in sociology, political science, history, biology, and philosophy. This paper illustrates how this can be done by modeling the economic and political effects of the average strength of a nation's work ethic and testing some of its implications.
