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Demande Du Riz Importe, Demande Du Riz Produit Localement Au Togo : Une Estimation À Partir Du Modèle Almost Ideal Demand System (Aids)

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  • Tchabletienne, Kombate
  • Koffi-Tessio, Egnonto M.
  • Diagne, Aliou
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    Abstract

    L’approximation linéaire du modèle Almost Ideal Demand System (LA/AIDS) est utilisée pour estimer la demande du riz (riz local et riz importé) au Togo de 1986 à 2006. Un modèle à correction d’erreur (MCE) a été développé pour tenir compte des relations de court terme entre les variables. Les paramètres de court et de long terme ont été estimés par les MCO. Dans cette étude, le riz local et le riz importé sont supposés être faiblement séparables des autres biens. Cette hypothèse excluant les relations avérées entre le riz importé et le riz local d’une part et entre ces produits, et les autres produits alimentaires d’autre part ; a conduit à estimer la demande du riz au Togo au deuxième stade d’un processus de maximisation de l’utilité. Les paramètres de court terme et de long terme obtenu, ont donc servi à calculer les élasticités conditionnelles marshalliennes de la demande du riz au Togo. The linear approximation of the model Almost Ideal Demand System (LA/AIDS) is used to estimate rice demand (local rice and imported rice) in the Togo between 1986 and 2006. An error correction model (ECM) was developed to capture the short terms relationships between the variables. The parameters of short and long run were estimated by the MCO. In this study, local rice and imported rice are supposed to be weakly separable from other goods. This assumption, excluding the relations proven between imported rice and local rice on the one hand and between these products, and the other food products on the other hand; resulted in estimating the demand of rice in Togo at the second stage of utility maximization process. The short and long run parameters obtained, were then used to calculate conditional Marshallian demand elasticises of rice in Togo.

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    Bibliographic Info

    Paper provided by African Association of Agricultural Economists (AAAE) & Agricultural Economics Association of South Africa (AEASA) in its series 2010 AAAE Third Conference/AEASA 48th Conference, September 19-23, 2010, Cape Town, South Africa with number 97329.

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    Date of creation: Sep 2010
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    Handle: RePEc:ags:aaae10:97329

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    Keywords: utilité; élasticités conditionnelles marshalliennes; demande; utility; conditional Marshallian elasticises; demand; Consumer/Household Economics;

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    1. Frank Asche & Cathy R. Wessells, 1997. "On Price Indices in the Almost Ideal Demand System," American Journal of Agricultural Economics, Agricultural and Applied Economics Association, vol. 79(4), pages 1182-1185.
    2. Alston, Julian M & Foster, Kenneth A & Green, Richard D, 1994. "Estimating Elasticities with the Linear Approximate Almost Ideal Demand System: Some Monte Carlo Results," The Review of Economics and Statistics, MIT Press, vol. 76(2), pages 351-56, May.
    3. Moschini, GianCarlo & Moro, D. & Green, Richard D., 1994. "Maintaining and Testing Separability in Demand Systems," Staff General Research Papers 11247, Iowa State University, Department of Economics.
    4. Moschini, GianCarlo, 1995. "Units of Measurement and the 'Stone Index' In Demand System Estimation," Staff General Research Papers 5058, Iowa State University, Department of Economics.
    5. Pashardes, Panos, 1993. "Bias in Estimating the Almost Ideal Demand System with the Stone Index Approximation," Economic Journal, Royal Economic Society, vol. 103(419), pages 908-15, July.
    6. Taljaard, Pieter R. & Alemu, Zerihun Gudeta & van Schalkwyk, Herman D., 2004. "The demand for meat in South Africa: An almost ideal estimation," Agrekon, Agricultural Economics Association of South Africa (AEASA), vol. 43(4), December.
    7. Eales, James S. & Unnevehr, Laurian J., 1994. "The inverse almost ideal demand system," European Economic Review, Elsevier, vol. 38(1), pages 101-115, January.
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