The paper outlines various measures of profitability and considers what role they can play in competition law. We argue that profitability measures can provide a good answer to the wrong question and a much less good answer to the question we really want to answer. Using appropriate definitions...

The U.S. federal government has brought major antitrust cases against Microsoft and Google. Regulators likely don’t expect to win either case outright, but the government doesn’t need to win these cases for them to have an impact. For one, an aggressive litigation strategy can provide a...

Competition agency guidelines, policy statements and related advocacy are an important vehicle for policy expression and the guidance of firms across the full spectrum of anti-competitive practices and market conduct. The role of guidelines and policy statements has, arguably, been particularly...

This paper contains an economic and legal analysis of the lawsuit Microsoft vs. U.S. Department of Justice beginning with the District Court's decision on June 7, 2000 up to the Proposed Final Judgement on November 6, 2001. I found that the courts' underlying economic paradigm regarding the...

This article, published in 1987, responds to John Shepard Wiley, A Capture Theory of Antitrust Federalism, 99 Harv. L. Rev. 713 (1986). In an earlier article, I argued that the "clear articulation" requirement is the best criterion for "state action" antitrust immunity because it reinforces...

The Antitrust Modernization Commission's (AMC's) recommendations relating to the IP/antitrust interface reflect what has become the consensus view among mainstream commentators that IP and antitrust are, for the most part, complementary rather than antagonistic bodies of law. In this article, I...

Innovation plays a crucial role in defining competitive dynamics. Given this fact, one might expect ‘innovation’ to play a consistent role in antitrust law. The present article conducts a systematic content analysis of the case law of the Court of Justice of the European Union to test this...

Antitrust regulation harms both consumers, competition, and innovation and therefore should be repealed. From a legislative standpoint, this would involve repealing the Sherman Act of 1890, the Clayton Act of 1914, and the Federal Trade Commission Act of 1914, as amended, including the...

For several years, an increasing number of commentators have been expressing concern that the U.S. has a growing market power problem. Further that dysfunction in the U.S. antitrust institutions, and their failure to protect competition, has damaged the economy. These concerns have led to...

Antitrust populists increasingly call on the government to “break up big tech.” But antitrust enforcers would face heavy evidentiary burdens if they sought to break a company up on the premise that a long-consummated merger was unlawful from the outset and should have been blocked years ago....