The authors provide a comparison of three spatial price policies: uniform pricing, mill pricing, and spatial price discrimination. Profits, consumer surplus, and social surplus are compared in a duopoly model. Until recently, oligopoly analysis has been stalled because of nonexistence of...

The log it model is usually derived from a discrete choice approach with stoc hastic utilities. It is shown here that the logit demand system may also be derived from the maximization of a deterministic, entropy-type utility. The latter may be interpreted as the preference function of a...

The authors propose a specific characteristics framework in order to construct linkages between alternative approaches to modeling product differentiation. It is shown that a demand system that satisfies the gross substitutes property imposes specific requirements on the locations of products....