Takes a close look at economics to examine when it falls short and when it works, to give a surprisingly upbeat account of the discipline. Drawing on the history of the field and his deep experience as a practitioner, Rodrik argues that economics can be a powerful tool that improves the world--but only when economists abandon universal theories and focus on getting the context right. Economics Rules argues that the discipline's much-derided mathematical models are its true strength. Models are the tools that make economics a science. Too often, however, economists mistake a model for the model that applies everywhere and at all times.