This bestselling textbook, now in its fourth edition, uniquely uses the tools of game theory, information economics, contracting issues, and practical examples to examine multiple facets of industrial organization. New to this edition are 14 optional econometric studies (empirical applications) that provide a more challenging and relevant option for instructors and students.Key features include: Provides a comprehensive guide to industrial organization in the imperfect market conditions of the real world; includes current research on real business behavior and public policy; features stronger coverage of information economics, contracting issues, and game theory than any other IO textbook; for the first time, important econometric issues are explored in 14 optional real-world empirical applications; includes useful derivation and reality checkpoints, including many new to this edition; the most accessible text conveying the vitality and relevance of industrial organization - both in theory and practice - available today; and, supported by a website containing an Instructor's Manual and PowerPoint slides.