AAI has been at the forefront of maintaining antitrust’s historic concern with monopolies, exclusionary conduct, and harmful vertical restraints.

Courts and antitrust enforcers have significantly narrowed the scope of monopoly enforcement under Section 2 of the Sherman Act. AAI and its progressive, “post-Chicago” approach is a long-standing counterweight that has become all the more important in light of the increasing market concentration and the dramatic growth of technology platform companies. AAI advocates for aggressive enforcement toward exclusionary conduct by dominant firms and a renewal of antitrust’s historic skepticism of durable monopolies, while rejecting simplistic “populist” approaches.