Includes bibliographical references (pages 455-474) and index.

Preface -- Introduction -- Horizontal agreements -- Defining the problem -- Communications -- Statutory provisions and higher court interpretations -- U.s. lower court practice -- Paradox of proof -- Oligopoly theory and the agreement requirement -- Price-fixing policy -- Social welfare -- Framework for decision-making -- Detection : market-based evidence -- Detection : other types of evidence -- Liability assessment -- Sanctions -- Unilateral market power -- Additional considerations -- Comparison of approaches -- Communications-based prohibition -- Detection of prohibited communications -- Further topics.