[eng] which all measures of concentration and indexes of aggregate monopoly power derived from the Lerner index, should possess. On this theoretical basis, they have demonstrated that within the confines of varions oligopoly models (non-cooperative Cournot-Nash, price leadership, differentiated...

[eng] The theoretical approach to pricing and cost allocation for telecommunication services. . This paper reviews some economie principles concerning pricing policy and cost allocating methods in telecommunications. It focuses on the links between sustainable market price equilibria and public...

[fre] Monopole power and distributive shares . David Encaoua, Bernard Franck. Starting from the theory tvhich relates relative factor shares to monopoly power, we try here to explain cross-industrial variations in the distribution of value-added. The model is tested upon a sample of 270 french...

[fre] L'objectif de cet article est d'expliquer les disparités des performances des sec­teurs de l'Industrie française, en prenant en compte l'existence des groupes de sociétés. L'hypothèse centrale est que l'introduction de ces agents remet en cause le schéma explicatif traditionnel, qui...

[eng] Regulation and deregulation of the telecommunication industry: from the american and british experiences to a possible evolution in France. . This paper focuses on the regulation and deregulation experiences in the american and british telecommunication industry, in relation to the...

[fre] L'objet de cet article est d'analyser les effets de la libéralisation du transport aérien en Europe. Chaque compagnie aérienne a un réseau de liaisons directes et indirectes connectant différents aéroports nationaux et internationaux à partir d'un aéroport central qu'elle domine...

[fre] Le but de cet article est de présenter une première synthèse des principaux critères de dés-industrialisation et des problématiques qui y correspondent, dans le contexte de la Communauté Européenne. Ce faisant, il est suggéré que les approches macro­économiques ont, en la...

[eng] State and firm « filieres » . Alexis Jacquemin, Michel Rainelli. The concept of « filière » refers to the input-output relationships between industriel sectors. One aspect of industrial policy is to improve industrial structure by reinforcing the control of these relationships,...

[eng] Spatial competition and distortuns of localization. Under incomplete information. . We study a model of spatial duopoly competition with sequential entry on a segment in the choice of locations (stage 1 of the game) and then simultaneous competition in delivery prices (stage 2). The second...