Predicting Politics: Essays in Empirical Public Choice explores politics in an empirical spirit. The topics covered are novel and important, including the impact of campaign finance on the size of government, the economics of gerrymandering, constitutional change, and budgetary politics. The approach is to formulate and to test interesting hypotheses about political behavior. The essential idea is to illustrate the power of public choice theory in explaining actual politics. The volume brings together the work of Crain and Tollison and other scholars who have worked in this public choice tradition, and shows the power of empirical approaches in explaining the origin and inner working of political institutions and processes.