I analyze a firm making a decision of whether to expose itself to risk in an exogenous parameter when the firm can change a choice variable after observing the realization of the exogenous parameter. For example, whether to choose an advertising campaign with a less certain outcome, when the...

We introduce a model of a rational credit card user's rather complex usage choices and develop an empirical framework to test its predictions. Employing a large national database of U.S. card accounts, we estimate how prices impact card usage and find that price effects are mostly well explained...

I examine strategic implications of competing for consumers with self-control problems. For investment goods, like health clubs, I find that the equilibrium sign-up (lump-sum) fees decrease when competition intensifies, similarly to prices in standard oligopoly models. However, the equilibrium...

I find that interconnection might cause the market to be less competitive, and might lead to an increase in the price firms charge for their product. Absent interconnection, firms compete for a consumer for two reasons. The first reason is to obtain revenue from selling the product to a consumer...

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...