Law and Economics Commons^™

Market Power In Antitrust, George A. Hay

George A. Hay

The concept of market power is at the core of antitrust. Philosophically, antitrust policy is aimed primarily at preventing firms from achieving, retaining, or abusing market power. Operationally, assessing whether a firm or firms have market power or any reasonable prospect for achieving it is often the first (and sometimes, the only) step in performing an antitrust analysis. Few would dispute that market power should play a prominent role in antitrust analysis. Nevertheless, important questions remain. Some of these questions quite naturally focus on the precise degree of importance given to market power. Is it an essential ingredient in antitrust …

Guiding Section 5: Comments On The Commissioners, Steven C. Salop

Georgetown Law Faculty Publications and Other Works

FTC Commissioners Joshua Wright and Maureen Ohlhausen have proposed that the Commission adopt Guidelines for the application of Section 5 to Unfair Methods of Competition. This short note comments on the role of Section 5 distinct from the Sherman Act. It suggests that Section 5 be used to attack and deter certain conduct that falls into gaps of the Sherman Act. This includes exclusionary unilateral conduct that likely leads to the achievement, enhancement, or maintenance of market power (as opposed to monopoly power). It also includes unilateral conduct such as invitations to collude and other practices that facilitate conscious …

Market Power In Antitrust, George A. Hay

Cornell Law Faculty Publications

The concept of market power is at the core of antitrust. Philosophically, antitrust policy is aimed primarily at preventing firms from achieving, retaining, or abusing market power. Operationally, assessing whether a firm or firms have market power or any reasonable prospect for achieving it is often the first (and sometimes, the only) step in performing an antitrust analysis.

Few would dispute that market power should play a prominent role in antitrust analysis. Nevertheless, important questions remain. Some of these questions quite naturally focus on the precise degree of importance given to market power. Is it an essential ingredient in antitrust …

Monopoly Power And Market Power In Antitrust Law, Thomas G. Krattenmaker, Robert H. Lande, Steven C. Salop

All Faculty Scholarship

This article seeks an answer to a question that should be well settled: for purposes of antitrust analysis, what is 'market power' and/or 'monopoly power'? The question should be well settled because antitrust law requires proof of actual or likely market power or monopoly power to establish most types of antitrust violations.

Examination of key antitrust law opinions, however, shows that courts define 'market power' and 'monopoly power' in ways that are both vague and inconsistent. We conclude that the present level of confusion is unnecessary and results from two different but related errors:

(1) the belief or suspicion that …