Quand une population exploite des ressources naturelles epuisables, la litterature montre que l'utilite par tete est decroissante le long du sentier optimal d'extraction. Dans un modele d'arbitrage consommation-loisir nous montrons lorsque le niveau de la population fait un saut vers le haut,...

In this paper we consider a two periods model of cropping using irrigation. The farmer takes two kind of decisions, one related to the level of investment in irrigation capacity and the other one to the irrigation level in each period. In the first period, decisions are taken under uncertainty...

This paper presents the first evidence linking directly household consumption profiles to the widely studied institution of sharecropping in developing countries. On the one hand, the theoretical rationale for sharecropping often calls for its risk sharing properties. On the other hand empirical...

Le but de l'étude consiste à analyser le processus de choix du type de formation retenu par les élèves en confrontant en particulier leurs voeux tels qu'ils les hiérarchisent et la décision administrative finale d'affectation. Parmi les déterminants qui font qu'un élève va préférer...

The existence of cartels, collusion and heterogeneity across firms is known to introduce some asymmetry in bidding games. A major difficulty when considering asymmetric auctions is that the equilibrium strategies are solutions of an intractable system of differential equations. This paper...

The objective of this project is to develop complementary modelling tools able to simulate the impact of alternative policy scenarios for the dairy sector over the medium term. Because the analysis of the European Union (EU) dairy policy in the future strogly depends on the evolution of the...

We show that a private label is an indirect mean to contract on quality in a vertical structure, and is signed by a downstream firm only when its bargaining power is high. When its bargaining power decreases, sharing the fixed cost of quality in a private label with the upstream firm is not...

The role of grading is to disclose the quality of individual units of output. Each firm produces high and low quality units in different proportions. Quality specification is a choice variable and, all producers have access to the same technology. The paper finds that greater access to grading,...