This paper provides a general framework that accounts for the decay of the average contribution observed in most experiments on voluntary contributions to a public good. Each player balances her material utility loss from contributing with her psychological utility loss of deviating from her...

Andreoni (1995) showed that pure framing effects may influence contribution in Voluntary Contribution Mechanisms (VCM) by comparing a standard public goods game, called the positive frame condition (giving to the public good), with a negative frame condition (taking from the public good) where...

Nous analysons l’impact de deux politiques américaines sur la production et les échanges d’éthanol (biocarburants de première génération) et d’éthanol ligno-cellulosique (biocarburant de seconde génération) aux Etats-Unis et au Brésil ainsi que sur les émissions directes et...

This paper addresses the role of market remoteness in explaining maize price volatility in Burkina Faso. A model of price formation is introduced to demonstrate formally that transport costs between urban and rural markets exacerbate maize price volatility. Empirical support is provided to the...

Competitiveness has come to the forefront of the policy debate within the European Union, focusing on price competitiveness and intra-EU imbalances. But how to measure competitiveness properly, beyond price or cost competitiveness, remains an open methodological issue; and how can we explain the...

Modelling is a relevant tool to study both environmental and economical performances of livestock systems. The aim of this paper is to present MOLDAVI, a model of broiler farming systems management under animal performances, environmental and economical issues. The system is a combination of...

This article explores the effect of EU regulation on baby food products. A large number of medical studies have shown that pesticides and contaminants contribute to various health problems including cancer, lung disease or reproductive, endocrinal and immune system disorders. They also agree...

Les auteurs analysent le développement des capacités d'innovation puis les stratégies de marché mises en oeuvre par les PME agroalimentaires. Le développement des capacités d'innovation repose sur une stratégie combinatoire de ressources impliquant différents partenaires qui...

A cause de la loi de Engel, le progres technique, en agriculture, ne cree pas a lui-meme son propre debouche. Il est donc impossible d'ameliorer la fonction de production agricole sans bouleversement de la structure interne de l'economie, ou des echanges exterieurs, ou des deux. Les modeles...

This article compares different policies in a rational expectations storage model with risk-averse consumers and missing insurance markets calibrated to represent a developing country. We consider an optimal storage policy under discretion and two optimal simple rules, a constant private storage...