The new Horizontal Merger Guidelines, if treated by courts as a source of law, would reduce the discretion traditionally exercised by courts in defining relevant markets and market power in merger cases. This is an undesirable shift in the balance of power because courts have used the market...

This is a paper about “big data” and antitrust law. For my purposes, big data refers to digital platforms that enable the discovery and sharing of information by consumers, and the harvesting and analysis of data on those consumers by the platform. The obvious example of such a platform is...

Intellectual property law and antitrust have been described as conflicting bodies of law, and the reason is easy to see. Antitrust law aims to protect consumers from the consequences of monopolization. Intellectual property law seeks to enhance incentives to innovate by granting monopolies in...

Antitrust enforcement regimes rely on two types of penalties for deterrence: penalties against the violating firm and penalties against the agents of the violating firm. In this paper I examine the economics of punishing agents versus firms. My area of application is antitrust, but the argument...

The antitrust laws of the United States have, from their inception, allowed firms to acquire significant market power, to charge prices that reflect that market power, and to enjoy supra-competitive returns. This article shows that this policy, which was established by the U.S. Congress and...

I describe a model of competition law enforcement that treats competition and innovation policy as the inseparable partners they ought to be. The enforcement authority determines an optimal punishment knowing that if it sets the penalty too high it will reduce firms’ incentives to invest in...