This paper presents an overview of what economists can say about vertical constraints by multi-sided platforms at this stage in the development of our knowledge about the economics of these businesses. It describes the general procompetitive and anticompetitive uses of vertical restraints by...

An antitrust authority deters collusion using fines and a leniency program. Unlike in most of the earlier literature, our firms have imperfect cumulative evidence of the collusion. That is, cartel conviction is not automatic if one firm reports: reporting makes conviction only more likely, the...

Lead jurisdiction models represent one option how to extend and enhance contemporary interagency cooperation among competition policy regimes. They constitute a multilateral, case-related form of cooperation that is suited to effectively create a one-stop-shop for the prosecution of...

Recent adoption of competition laws across the globe has highlighted the importance of institutional considerations for antitrust effectiveness and the need for comparative institutional analyses of antitrust that extend beyond matters of substantive law. Contributing to the resulting nascent...

This Essay provides an overview of U.S. antitrust merger practice in addressing efficiencies both in terms of actual practice before the agencies and in scholarly work as a response to Jamie Henikoff Moffitt's Vanderbilt Law Review article Merging in the Shadow of the Law: The Case for...

The present paper analyzes the interaction between the economic review of the probition of abuses of a dominant position (Article 82 EC) on the one hand and the efforts to enhance private enforcement of competition law through private damage claims on the other hand. The paper argues that...

This paper considers the effect of taxes on the definition of relevant markets in antitrust analysis by examining various measures used within the hypothetical monopoly test. We show that the use of net margins (between producer prices and marginal cost) is a proper correction, but that it is...

The essay develops a new approach for antitrust analysis of pay-for-delay settlements in pharmaceutical patent infringement cases, an approach that shows them to be presumptively prohibited agreements in restraint of competition. The issue is timely in light of the Watson v FTC case now pending...

Private antitrust litigation often involves a dominant firm being accused of exclusionary conduct by a smaller rival. In such cases, the defendant generally has a much larger financial stake in the outcome. We explore the implications of this asymmetry in a model of litigation with endogenous...