Global warming may induce in Western Europe an increase in storms. Hence the forest managers will have to take into account the risk increase. We study the impact of storm risk at the stand level. From the analytical expressions of the Faustmann criterion and the Expected Long-Run Average Yield,...

[fre] Un modèle d'enchères de bois sur pied par Bernard Elyakime et Patrice Loisel . Les bois sur pied sont souvent vendus en France par enchères avec prix de retrait secret dans lesquelles le produit est mal défini quant à son volume. Nous étudions un modèle en valeur privée...

Face à la montée du salariat à temps partiel notamment dans les groupements d’employeurs agricoles, nous étudions cette structure afin de rendre plus attractif l’emploi salarié dans un groupement d’employeurs : paiement incitatif des salariés et conditions de son existence. Chaque...

We study contracts designed to remunerate a farmer for the production of an ecosystem service with the payment dependent on the results of the farmer’s actions and on weather conditions. Two contracts are proposed: the first takes into account both the results of the farmer’s...

In this paper we consider a first-price sealed bid auction with a secret reservation price. Such auctions are used frequently in France to sell timber. Within the independent private values paradigm, we show that the equilibrium strategy of the seller is to choose a reservation price equal to...

We study contracts designed to remunerate a farmer for the production of an ecosystem service with the payment dependent on the results of the farmer’s actions and on weather conditions. Two contracts are proposed: the first takes into account both the results of the farmer’s actions and a...

Several adaptive functions, including gaining information from other group members and detecting predators, are generally ascribed to vigilance in groups of animals subject to predation. Most studies of the effects of neighbors on vigilance have focused on individual vigilance. We investigated...

[fre] Asymétrie dans des enchères à prix de retrait secret. . Les bois sont le plus souvent vendus en France par enchères avec prix de retrait secret. Celles-ci peuvent être raisonnablement modélisées dans le cadre de la valeur privée. Avec des acheteurs supposés symétriques, le...

Vis-a-vis the increasing of part-time wage labour in agricultural pool of employers, we study this structure to make more attractive the employee?s payment: conditions of an inciting payment of the wage workers. In the pool, the exogenous weight of each employer is then a significant parameter:...