Welcome to the first issue of Competition Policy International. This inaugural volume begins with a colloquy about tying, an unsettled area in both economics and law.

Our Autumn 2007 issue of <i>Competition Policy International</i> features a truly international collection of antitrust experts from the Asia-Pacific region, the European Union, and the United States.

This paper provides a brief introduction to the economics of two-sided platforms and the implications for antitrust analysis.

Whose welfare should competition policy protect? That is the subject of the first two articles in our Autumn 2006 edition. The fact that a debate is even taking place over whether consumer or total (consumer plus producer) welfare is the right standard for competition policy is remarkable.

Firms with market power engage in a variety of business practices that harm their rivals. Under what circumstances should the antitrust laws condemn these practices because they will harm consumers?

The second issue of Competition Policy International begins with articles by two distinguished jurists representing both sides of the Atlantic.

Our fifth issue of <i>Competition Policy International</i> brings diverse fare from 29 leading economists and lawyers from the European Community and the United States.

Rohlfs presents a model that seems better suited to analysis of new Internet-based businesses that rely on network effects, like Facebook and YouTube. Richard Schmalensee (MIT)