In March 2004, following a five-year investigation, the European Commission found Microsoft liable for illegally tying the Windows Media Player to the Windows operating system. This Column evaluates the antitrust issues and the proposed remedy. What is remarkable is that the remedy eliminates...

In Cournot's model of complements, the producers of A and B are bothmonopolists. This paper extends Cournot's model to allow for competitionbetween complements on one side of the market. Consider two complements,A and B, where the A + B bundle is valuable only when purchasedtogether. Good A is...

Economic theory offers two different approaches to the analysis of group formation and the role of institutions. The general equilibrium approach explores the influence of the economic environment on the formation of groups. The game theoretic approach runs in the opposite direction; it explores...