Causation is one of the most underexplored areas in antitrust law. What must a plaintiff show to connect a defendant’s conduct with anticompetitive effects? Several tests are possible, including “but for” causation, proximate cause, sole causation, reasonable connection, and increased...

The ability of intellectual property owners to earn monopoly rents and the inability of horizontal competitors to price fix legally are two propositions that are often taken as givens. This article challenges the wholesale adoption of either proposition within the context of buyer price-fixing...

Antitrust risks arise in common intellectual property transactions. This article reviews the general principles in the antitrust analysis of transactions involving the licensing of intellectual property rights, and applies those principles in the context of practical counseling

The prohibition of certain types of anticompetitive unilateral conduct by firms possessing a substantial degree of market power is a cornerstone of competition law regimes worldwide. Yet notwithstanding the social costs of monopoly modern legal regimes refrain from prohibiting it outright....

This paper explores the use of collusion theories in merger analysis at the Federal Trade Commission. The 1992 Merger Guidelines focuses on unilateral effect, relegating collusion analysis to a second tier theory. Both structural and behavioral conditions conducive to establishing or maintaining...

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...

Following the generally accepted theories of the legal scholar Robert Bork and his Chicago School colleagues, vertical restraints such as exclusive dealing contracts are presumptively procompetitive and welfare-enhancing because it would be irrational for a buyer to exclude the lowest cost...

It is a little-known fact that Canada adopted its own antitrust laws one year before the landmark Sherman Antitrust Act of 1890. The Anti-Combines Act of 1889 was adopted after a decade in which ‘combines’ (the Canadian equivalent of ‘trusts’) grew more numerous. From their numbers,...

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...

In this article the forgotten role of prices in the analysis of vertical effects is described. While at least some vertical restraints have the potential to entail anticompetitive harm, it is demonstrated that competition law may be overshooting the mark if no account is taken of both, the...