The Antitrust Revolution: Economics, Competition, and Policy, 4/e, consists of a set of twenty original essays on important recent antitrust cases, commissioned and edited by John E. Kwoka, Jr. and Lawrence J. White. Each essay discusses a single case and was written by an economist who actually participated in the case. The cases are organized into three major sections: horizontal structure; horizontal practices; and vertical and complementary market issues. Each section has an introductory/overview essay written by the editors. This collection is a unique resource. No other book provides such detailed economic analyses of antitrust cases. No other book provides the comprehensive coverage of recent and emerging issues as does this volume. None draws on the experience and reputation of so many leading economists to explain the analyses that underlay the arguments in their cases. The Antitrust Revolution, 4/e, can be used in undergraduate and graduate classes in industrial organization, government policy, and antitrust/regulation law and economics. It is also a useful reference book for lawyers and economists - both academics and practitioners - who are interested in the types of economic analyses that have been applied in recent antitrust cases. For this fourth edition, fourteen new cases have been added, and six cases from the third edition have been updated and shortened. Among the important recent antitrust cases covered in the book are the British Petroleum/ARCO merger (2000), Toys "R" S (2000), American Airlines (2001), US vs. Microsoft (2001), and AOL Time Warner (2000).