The idea that there is a tension between antitrust and the intellectual property laws is readily exaggerated. The tension that exists results mainly from our uncertainty about the optimal amount and scope of IP protection. In general, antitrust draws clearer lines than intellectual property law...

Antitrust litigation often involves situations where important relevant information is limited or costly to obtain, behavior is complex and can have multiple explanations, or theory is not particularly well developed. As a result, legal and factual presumptions, evidentiary shortcuts, and...

In Apple v. Pepper the Supreme Court held that consumers who allegedly paid too much for apps sold on Apple’s iStore could sue Apple for antitrust damages because they were “direct purchasers.” The decision reflects some bizarre complexities that have resulted from the Supreme Court’s...

Antitrust in the United States today is caught between its pursuit of technical rules designed to define and implement defensible economic goals, and increasing calls for a new antitrust “movement.” The goals of this movement have been variously defined as combating industrial concentration,...

An important purpose of the antitrust merger law is to arrest certain anticompetitive practices or outcomes in their “incipiency.” Many Clayton Act decisions involving both mergers and other practices had recognized the idea as early as the 1920s. In Brown Shoe the Supreme Court doubled down...

This book of CASES AND MATERIALS ON INNOVATION AND COMPETITION POLICY is intended for educational use. The book is free for all to use subject to an open source license agreement. It considers numerous sources of competition policy in addition to antitrust, including those that emanate from the...

Antitrust policy promises to be an important issue in the 2020 presidential election, and for good reason. Market power measured by price-cost margins has been on the rise since the 1980s. Presidential candidate Senator Elizabeth Warren has two proposals directed at large tech platforms. One...

“Horizontal shareholding” occurs when one or more equity funds own shares of competitors operating in a concentrated product market. For example, the four largest mutual fund companies might be large shareholders of all the major United States air carriers. A growing body of empirical...

Why would anyone want to use antitrust law as a wealth distribution device when far more explicit statutory tools are available for that purpose? One feature of antitrust is its open-textured, nonspecific statutes that are interpreted by judges. As a result, using antitrust to redistribute...

Antitrust’s consumer welfare principle is accepted in some form by the entire Supreme Court and the majority of other writers. However, it means different things to different people. For example, some members of the Supreme Court can simultaneously acknowledge the antitrust consumer welfare...