Food Standards and Welfare: A General Equilibrium Model with Market Imperfections

We analyze the effects of high standards food chains on household welfare taking into account general equilibrium effects and market imperfections. To measure structural production changes and welfare effects on rural and urban households, our model has two types of agents, five kinds of products and four types of factors. We calibrate the model using dataset from China. The simulation results show that how poor rural households are affected depends on a variety of factors, including the nature of the shocks leading to the expansion of high standards sector, production technologies, trade effects, spillover effects on low standards markets, market imperfections, and labor market effects

Complementarity in the adoption of traceability of beef cattle in Brazil

Abstract Complementarity is an interesting approach to explain technology adoption. Taking account the other activities the farm performs in its production strategy can help understanding the decision on the adoption of new agricultural technology. This paper aims to evidence the existence of synergic effect resulting from the joint adoption of feedlot and traceability certification of beef cattle in Brazil. A sample of 84 beef cattle farms provided data to test hypotheses by using an OLS regression model. A measure of performance – revenue – is regressed on variables representing both isolated and joint adoption of capital-intensive production system and traceability. The results suggest the existence of synergic effect when joint adoption takes place. Joint adoption is influenced by a set of management practices, such as forward contracts, training of employees and zootechnical performance control, which are shared by both capital-intensive production systems and traceability

Modèle de l'économie mondiale de blé

A world wheat model. - A simple structural model of the wheat economy has been constructed to examine the possible impact of policies and external shocks on the evolution of the world wheat market. The model consists of a set of linear equations describing area harvested, yields, utilisation, stocks and trade for fifteen countries or country aggregates and solves for an indicator world price. Simulations over the historical period indicate that this price has been strongly dominated by the United States stock policies although it is sensitive to variations in Soviet Union import demand.Pour analyser l'impact possible de politiques et de chocs externes sur l'évolution du marché mondial du blé, un modèle structurel simple de l'économie du blé a été construit. Le modèle, composé d'équations linéaires, évalue les surfaces récoltées, les rendements, les utilisations intérieures, les stocks et les échanges pour quinze pays ou groupe de pays, ainsi qu'un indicateur du prix mondial: Des simulations sur la période historique indiquent que la formation de ce prix a été fortement dominée par la politique de stockage des Etats-Unis, tout en étant très sensible aux variations de la demande d'importation de l'URSS.Fulponi-Beglin L. Modèle de l'économie mondiale de blé. In: Économie rurale. N°174, 1986. L'agriculture dans la compétition internationale. 2eme Partie. pp. 30-38