In many countries, a reversing trend in the evolution of the hired labour force in agriculture was observed : its share in the agricultural employment which had decreased regularly since decades has increased for the last ten years. We propose an analysis of the factors bearing upon the...

The object of this paper is to explore how to use administrative data for econometric purposes when these data measure total annual duration spent in various states. A basic issue addressed in this paper is to check whether the information extracted through categorizing continuous data actually...

The early careers of French doctors in life sciences are characterized by the importance of temporary jobs. While most young Ph.D. researchers wish to obtain a job in the French academic sector (which grants them, among other things, lifetime employment), few of them manage to achieve this...

Ce travail se justifie par l'absence d'indicateur socio-économique de gestion durable de la forêt privée fragmentée des agriculteurs. L'objectif est d'apprécier la performance de différents scénarios sylvicoles avec un outil qui tienne compte des spécificités de cette forêt telle que...

We propose a structural empirical approach à la Levinsohn and Petrin (2003) to disentangle the effect of experts' grades from the effect of unobserved quality on the pricing of experience goods. Using a panel data set of 108 châteaux selling wine on the Bordeaux "en primeur" market, we provide...

Dans une première partie, l'auteur rappelle brièvement les principes de la certification ISO 14001. La Fédération Nationale des Coopératives d'Utilisation de matériel Agricole (FNCUMA) est engagée depuis 1998 dans une expérimentation visant à adapter la procédure de certification à la...

Bottled water consumption has been steadily growing in the world for the past 30 years, in spite of its excessively high price compared to tap water. The Italian drink more bottled water than anybody else in the world, followed by the French who drink about 130 liters per year per inhabitant. In...

Sharecropping theory generally does not take into account land fertility. We develop a repeated Principal-Agent model under moral hazard where the Principal delegates the use and maintenance of a productive asset. In a multitask framework, we characterize the optimal spot contract focusing on...

We study the effects of a conditional transfers program on school enrollment and performance in Mexico. We provide a theoretical framework for analyzing the dynamic educational decision and process including the endogeneity and uncertainty of performance (passing grades) and the effect of a...

Focus of this work is on the contract known as actions-incentive. We suppose it applies to a group of producing farmers of a positive externality. This externality is perceived as a public asset which the society wishes to remunerate. When then analyse the pros and cons and the conditions...