The book presents a modern approach to understanding U.S. antitrust law, illuminating the economic analysis that dominates modern antitrust analysis in a straightforward way that minimizes technical jargon and makes the underlying economic concepts accessible to a broad audience. The cases are carefully edited to present the facts and issues clearly and succinctly, and this third edition completely revamps the book to include detailed textual answers to all the tough questions and details how to apply modern antitrust economic analysis to the cases. The result is a book that is quite compact, around 800 pages, but covers the full waterfront of antitrust issues and generates plenty of multi-layered points and ideas to fill a class. Throughout the book incorporates important Supreme Court antitrust cases and agency guidelines. The merger section focuses on modern agency practices and merger theories, and selected cases that illustrate them, rather than on outdated Supreme Court cases that no longer describe current merger enforcement. In addition to adding detailed answers to the questions, the third edition updates the book to incorporate recent developments, including the decisions in Actavis, North Carolina Dental, Meritor, and Eisai.