Complexity science is widely used across the policy spectrum but not in antitrust. This is unfortunate. Complexity science enables a rich understanding of competition beyond the simplistic descriptions of markets and firms proposed by neoclassical models and their contemporary neo-Brandeisian...

The Department of Justice ("DOJ") monopoly report is enormously disappointing for a number of reasons. The Federal Trade Commission ("FTC") was wise to participate in this important project, but equally wise to distance itself from the final work product. The final report represents a serious...

In the past few years, courts and the Department of Justice have cited approvingly the Court's dicta in Verizon Communications Inc. v. Law Offices of Curtis V. Trinko, LLP. This article analyzes why the economic thinking in Trinko is wrong, and how the Court ignores its precedent involving the...

The controversy around the breakaway European Super League, set to conquer the UEFA Champions League, and the surrounding antitrust proceedings revive the academic discussion about the monopoly power of sport-internal governing bodies (like the UEFA), the justification for and limits of their...

The power of today’s tech giants has prompted calls for changes in antitrust law and policy which, for decades, has been exceedingly permissive in merger enforcement and in constraining dominant firm conduct. Economically, the fear is that the largest digital platforms are so dominant and its...

In markets with significant scale economies and network effects, scholars and policymakers often tout open access and interoperability requirements as superior to both regulated monopoly and the break-up of dominant firms. In theory, by compelling firms to coordinate to develop common...

Market power is the most important determinant of liability in competition law cases throughout the world. Yet fundamental questions on the relevance of market power are underanalyzed, if examined at all: When and why should we inquire into market power? How much should we require? Should market...

The controversy around the breakaway European Super League, set to conquer the UEFA Champions League, and the surrounding antitrust proceedings revive the academic discussion about the monopoly power of sport-internal governing bodies (like the UEFA), the justification for and limits of their...

In this paper we study price competition, equilibrium market configurations and entry when firms compete in vertically-di¤erentiated markets producing complementary goods. We consider two complements and start from a configuration where the market for one complement is a duopoly, whereas the...

I discuss the impact of tying, bundling, and loyalty/requirement rebates on consumer surplus in the affected markets. I show that the Chicago School Theory of a single monopoly surplus that justifies tying, bundling, and loyalty/requirement rebates on the basis of efficiency typically fails....