Rational Choice and Politics

Abstract

The rational-choice approach brings scientific deductive methods to bear on politics. Appropriate methods are derived from physics, when actors interact probabilistically but non-rationally, and from game theory when they interact rationally. Collective action problems occur in the provision of public goods. As policies are themselves public goods, this leads to the game-theoretic analysis of voting, bureaucracy and lobbies. It is inconsistent to believe that economic actors are basically self-interested but that political actors are not. Rather, one should treat people as equally (not necessarily wholly) self-interested in each sphere. The paradoxes of social choice are then shown to have important implications for political science.