Search firms provide matchmaking services between consumers and suppliers that are central to the efficiency of the economy. The significant economic contributions of search firms as commercial intermediaries have important implications for antitrust policy towards search markets. As search...

We show that in many applied economic models, it is possible to reduce the dimensionality of the space of actions to what we call sufficient decisions. We find that for monopoly and oligopoly in multi-sided markets and multi-product markets, the market equilibrium can be transformed into an...

The analysis provides conditions under which Standard Setting Organizations (SSOs) choose efficient technology standards. I introduce a two-stage game with both voting and market competition. In equilibrium, standards and market outcomes are efficient even with market power from scarce capacity...

This article extends antitrust analysis to two-sided markets in which a virtual monopolist competes with local bricks-and-mortar dealers. The discussion examines the market power of an Internet market maker as well as an Internet matchmaker. The analysis shows that equilibrium in a two-sided...