[eng] This article surveys the theories of labor market segmentation as they have been developed in the United States. It distinguishes two broad categories of approaches : The Radical Theory of economists and the New Structuralism of Sociologists. These theories show that differenciations which...

[eng] The book publishing industry, for which we will argue ther market structure is one of oligopoly with a competitive fringe, offers a case study of the relationship between large and small enterprises. The small firms do not at all constitute a homogeneous group characterized by certain...

[fre] Cet article s'appuie sur des observations faites entre 1993 et 2000 dans un Atelier de la RATP où une règle salariale a été instaurée, pour étudier les modes d'action des règles. Nous montrons d'abord qu'il ne faut jamais considérer une règle isolée, mais un ensemble de règles...