The article discusses the origins of the U-shaped average cost curve, which is one of the most widely used tools in microeconomic analysis. Its widespread use leads many to consider it as a basic tool, obscuring the fact that the graph of the U-shaped average cost curve is part of a complex...

In several papers, Negishi revisted the foundations of competitition. Sensitive to the Edgeworthian views of exchange but strongly influenced by the law of indifference of Jevons, he tried to reconcile both approaches. The main result of this synthesis is the equivalence between the walrasian...

Ce manuel expose les connaissances de base nécessaires en premier cycle de microéconomie avec le souci d'en faciliter l'approche mathématique. Des exercices d'entraînement nécessitant le maniement d'équations ou de graphiques sont proposés après chaque chapitre et corrigés en fin d'ouvrage.

Hayek draws the general lines of an analysis of economic knowledge in taking up two different directions. On the one hand he draws his attention on the knowledge used by the agents in the course of the economic process; on the other one he seeks for the theoretical knowledge required to explain...

The reasons for the rise of the theories of monopolistic competition are fairly well identified. This is much less the case for their decline. This article will identify the forces that are responsible for the fact that the theories of monopolistic competition remain an interlude in the history...

The concept of a barrier to entry has been discussed least since Bain [1956] with important contributions by Spence [1977], Dixit [1980] and Milgrom-Roberts [1982]. The more recent discussion is synthesized in the contributions to a dedicated session at the 2004 AEA meeting. Yet, a 'barrier to...