Some of the most conspicuous and intriguing international differences in institutions lie in the control, ownership, and integration of enterprises. It is widely accepted that Coase's classic questionWhy does the boundary between the firm and the market fall where it does?is answered by...

This is a survey of the economic principles that underlie antitrust law and how those principles relate to competition policy. We address four core subject areas: market power, collusion, mergers between competitors, and monopolization. In each area, we select the most relevant portions of...

This handbook chapter appears in Antitrust Law & Economics (Keith Hylton, ed. 2010). It describes the role of market concentration in the legal framework for the antitrust review of horizontal mergers and evaluates the extent to which modern economic analysis supports a role for concentration in...