[fre] Dans cet article, on étudie les conséquences d'un relâchement de l'hypothèse de rendements constants dans une industrie aval, lorsqu'on compare une filière industrielle organisée en deux secteurs distincts (un monopole amont, entreprises concur­rentielles en aval) d'une part, et un...

[eng] Some instruments to regulate a public enterprise . . In this paper, we stuc!y the consequences of divergent objectives between a public enterprise and the govenment. While the enterprise, for informational reasons, includes only sectorial elements into its objective function, the...

[fre] Exploitation d'une ressource non renouvelable,possibilité de stockage et règle d'Hotelling . . Rares sont les modèles de l'entreprise minière qui tiennent compte explicitement des possibilités de stockage de la firme. Nous montrons qu'un monopole peut être conduit à stocker tout ou...

[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...

[eng] Absolute rent, differential rent, wage and profit. . In the srafjaian rent theory, the marginal land dont pay any rent. Under this condition it is shown that the différences in the « fertilities » of lands are not pure natural data, but result from the distribution of income. But let us...

[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...