A contemporary consensus in antitrust discourse inappropriately places exclusionary conduct at the periphery of competition policy, while putting collusion at the core. Contrary to that common view, exclusion is as important as collusion as a matter of precedent, the structure of doctrinal...

The relationship between competition and innovation is the subject of a familiar controversy in economics, between the Schumpeterian view that monopolies favor innovation and the opposite view, often associated with Kenneth Arrow, that competition favors innovation. Taking their cue from this...

The relationship between competition and innovation is the subject of a familiar controversy in economics, between the Schumpeterian view that monopolies favor innovation and the opposite view, often associated with Kenneth Arrow, that competition favors innovation. Taking their cue from this...

This handbook chapter appears in Antitrust Law & Economics (Keith Hylton, ed. 2010). It describes the role of market concentration in the legal framework for the antitrust review of horizontal mergers and evaluates the extent to which modern economic analysis supports a role for concentration in...

This comment on a forthcoming article by Keith Hylton and David Evans explains why considerations of "dynamic competition" do not argue against antitrust enforcement. While the prospect of achieving monopoly may foster innovation, that observation misleads as to appropriate antitrust policy...

As is well known among financial economists but not previously recognized within the antitrust community, large and diversified institutional investors such as BlackRock, Fidelity, State Street, and Vanguard collectively own roughly two-thirds of the shares of publicly traded U.S. firms overall,...

The past forty years have witnessed a remarkable transformation in horizontal merger enforcement in the United States. With no change in the underlying statute, the Clayton Act, the weight given to market concentration by the federal courts and by the federal antitrust agencies has declined...

This article shows how the norm supporting governmental action to protect and foster competitive markets was harmonized with economic rights to contract and property during the 19th century, and with the development of the social safety net during the 20th century. It explains why the...