Cover -- Title Page -- Copyright -- Dedication -- Contents -- Introduction -- I. The Market Power Paroxysm and the Antitrust Paradigm -- 1. Market Power in an Era of Antitrust -- 2. The Faltering Political Consensus Supporting Antitrust -- 3. Preventing the Political Misuse of Antitrust -- 4....

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...

In response to antitrust cases challenging the exclusionary conduct of dominant firms, some dominant firms offer an “appropriability defense.” This defense is the claim that prohibiting the challenged conduct would lessen the dominant firm’s return to investment in research and development...

As is well known among financial economists but not previously recognized within the antitrust community, large and diversified institutional investors such as BlackRock, Fidelity, State Street, and Vanguard collectively own roughly two-thirds of the shares of publicly traded U.S. firms overall,...