This classic casebook provides students and novice antitrust teachers the tools to deal with modern antitrust law and policy, including basic economic terms and concepts. For the advanced scholar, the casebook draws upon a rich set of cases, guidelines, scholarly commentary, briefs, and newspaper articles to motivate discussion of how policy goals are implemented by judges, practicing lawyers, and government policy makers. The book commences with foundational material spanning across antitrust claims, then proceeds to detail modern and classic approaches primarily to Sections 1 and 2 of the Sherman Act and Section 7 of the Clayton Act. The casebook concludes with important immunities and defenses. The update streamlines much of the case discussion to focus more on modern approaches, and eliminates chapters that are typically only taught in an advanced antitrust course.