The antitrust litigation process is, to a large and perhaps surprising degree, driven by the underlying economic literature. The articles in this volume have been chosen to provide a sense of both the history and the current state of thinking about antitrust.The opening section considers the flaws in the 1960s view on monopoly. Part II then examines economic thinking with respect to mergers. The next three sections contain selections on three specific sets of practices that have been frequent targets of antitrust scrutiny. Part VI examines perspectives on exclusionary behavior. Part VII studies the literature on network externalities. The final part explores works in the area of bureaucracy and politics.This insightful volume will be a valuable source of reference for both economists and lawyers concerned with antitrust and competition issues.