L'industrie informatique connait, depuis les annees 80, de profondes turbulences qui se sont traduites au cours de ces derniere annees par une redistribution des positions de marche. On evoque le passage d'un modele vertical d'organisation de l'industrie a un modele horizontal qui correspondrait...

This paper presents an overlapping generations model of environmental externalities with a depollution technology. each agent concerned by the environmental degradation can volutary contribute in order to reduce it. Contributing to the environmental quality means financing depollution activities...

First and second price collusive auction mechanisms from the literature on bid rigging within the independent private values model are extended to be applicable within the general symmetric model where signals are affiliated. A mechanism which allow information sharing is also proposed. The...

We derive the characteristics of firm-specific trade policies when industries consist of heterogeneous firms, and show how the informational requirements for policy design are thereby expanded. A consideration of these informational requirements indicates that governments will confront...

En utilisant le modele du Principal-Agent pour decrire la relation qui peut s'etablir entre un trafiquant ou un membre d'une organisation criminelle et un organisme financier, nous montrons qu'il existe des incitations economiques a l'etablissement d'une negociation entre eux pour fixer les...

We present new conditions that guarantee the existence of mechanism with a unique or essentially unique equilibrium in auction and public goods problems with quasi-linear utility functions. These conditions bear only on the information structures of the agents.

En considerant que l'une des caracteristiques des problemes environnementaux est le niveau d'incertitudequi les accompagne, nous proposons d'etudier les effets de ces incertitudes sur les comportements de choix de portefeuille et d'epargne des agents. Nous montrons alors qu'a l'equilibre...

This paper proposes a model which intends to analyse the alternative between discrimination and mutualisation in insurance. We suppose there exists an observable (but initially hidden)variable, that predicts the level of risk of an individual. This variable can be observed through a testing...