Monopoly - it's not just a game : the roots of America's anti-monopolist movement -- Don't trust the trusts : James J. Hill, the Gilded Age, and the labor movement -- A heartland rebellion : the grangers, a political prairie fire, and a republican authors the Sherman Act -- Teddy Roosevelt and...

American markets, once a model for the world, are giving up on competition. Thomas Philippon blames the unchecked efforts of corporate lobbyists. Instead of earning profits by investing and innovating, powerful firms use political pressure to secure their advantages. The result is less efficient...

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...