EVOLUTIONARY APPROACH AND RATIONAL CHOICE APPROACH IN SOCIOLOGY

In the field of game theoretical research in sociology, there are two different approaches, rational choice approach and evolutionary approa ch. Rational choice approach postulates actors' high caluculas ability and they are assumed to select Nash equilibria with consideration bef ore the game. On the other hand, in evolutionary approach, actors only have bounded rationality and they select better strategy after the ga me in repeated games. These two approaches have been believed to be me thodologically different. But recent advance in evolutionary game theo ry combines these two approaches. It is clarified that Stable States i n an evolutionary game correspond to Nash equilibria in one-shot game, so actors with bounded rationality can select Nash equilibria. These two approach should be called ''rational choice theory in the wide sen se'' and they can go together fruitfully.