Has the antitrust arsenal run out of novel theories or weapons? Think again. Recent scholarship has come to challenge conventional wisdom with the latest target of antitrust imagination being institutional investors, including diversified index funds. New economic research suggests that common...

Minority shareholdings have been on the regulatory agenda of competition authorities for some time. Recent empirical studies, however, draw attention to a new, thought provoking theory of harm: common ownership by institutional investors holding small, parallel equity positions in several...

Empirical evidence that horizontal shareholding has created anticompetitive effects in airline and banking markets have produced calls for antitrust enforcement. In response, others have critiqued the airline and banking studies and argued that antitrust law cannot tackle any anticompetitive...

There are very few industries that can attract the attention of Congress, multiple federal and state agencies, consumer groups, economists, antitrust lawyers, the business community, farmers, ranchers, and academics as the agriculture workshops have. Of course, with intense interest from...

This comment was filed with the Department of Justice Antitrust Division on December 31, 2009, as "Comments Regarding Agriculture and Antitrust Enforcement Issues in Our 21st Century Economy" in response to the DOJ/USDA request for public comments for the agencies' joint workshops on antitrust...

In today’s digital economy, online competitive advertising plays a central role in informing consumers about low prices and other desirable product features. Accordingly, rivals have a strong incentive and opportunity to place anticompetitive limits on the flow of information. They do so by...

The question of whether and how partial common-ownership links between strategically interacting firms affect firm objectives and behavior has been the subject of theoretical inquiry for decades. Since then, the growth of intermediated asset management and consolidation in the asset-management...

Computational antitrust is a new domain of legal informatics which seeks to develop computational methods for the automation of antitrust procedures and the improvement of antitrust analysis. The present article first introduces it, then explores how agencies, policymakers, and market...

I present an overview of the antitrust literature on sports leagues, with particular emphasis on the National Collegiate Athletic Association, the National Football League, Major League Baseball, the National Basketball Association, and the National Hockey League, as well as on sanctioning...