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Choix entre diverses spécifications pour l’étude de la demande agrégée des produits agro-alimentaires en Tunisie


  • Ayadi, Mohamed

    (Groupe de recherche en économie mathématique et quantitative (GREMAQ), Université des sciences sociales de Toulouse)


This paper aims to provide a specification of the demand system for the agro-alimentary products of Tunisia. The difference between the market structure of these products will make us consider the estimation of three different demand systems: the mixed system, the classical system and the reciprocal system. We will test these demand systems with the Hausman test and find that the statistical specification of the mixed one is better. Ce texte porte sur la spécification d’un système de demande des produits agro-alimentaires en Tunisie. La structure de marché rattachée à chaque produit étant différente, nous devrons considérer l’estimation de trois types de système de demande : le système mixte, le système classique et le système réciproque. Nous trouverons, à l’aide du test de Hausman, que le système mixte est supérieur aux deux autres du point de vue de la spécification statistique.

Suggested Citation

  • Ayadi, Mohamed, 1988. "Choix entre diverses spécifications pour l’étude de la demande agrégée des produits agro-alimentaires en Tunisie," L'Actualité Economique, Société Canadienne de Science Economique, vol. 64(2), pages 157-177, juin.
  • Handle: RePEc:ris:actuec:v:64:y:1988:i:2:p:157-177

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    References listed on IDEAS

    1. Hausman, Jerry, 2015. "Specification tests in econometrics," Applied Econometrics, Publishing House "SINERGIA PRESS", vol. 38(2), pages 112-134.
    2. Gordon Anderson & Richard Blundell, 1983. "Testing Restrictions in a Flexible Dynamic Demand System: An Application to Consumers' Expenditure in Canada," Review of Economic Studies, Oxford University Press, vol. 50(3), pages 397-410.
    3. S. E. Pudney, 1981. "An Empirical Method of Approximating the Separable Structure of Consumer Preferences," Review of Economic Studies, Oxford University Press, vol. 48(4), pages 561-577.
    4. Nakamura, Alice & Nakamura, Masao, 1981. "On the Relationships among Several Specification Error Tests Presented by Durbin, Wu, and Hausman," Econometrica, Econometric Society, vol. 49(6), pages 1583-1588, November.
    5. Laitinen, Kenneth & Theil, Henri, 1979. "The Antonelli matrix and the reciprocal Slutsky matrix," Economics Letters, Elsevier, vol. 3(2), pages 153-157.
    6. Bewley, R. A., 1983. "Tests of restrictions in large demand systems," European Economic Review, Elsevier, vol. 20(1-3), pages 257-269, January.
    7. Oberhofer, W & Kmenta, J, 1974. "A General Procedure for Obtaining Maximum Likelihood Estimates in Generalized Regression Models," Econometrica, Econometric Society, vol. 42(3), pages 579-590, May.
    8. Bronsard, Camille & Salvas-Bronsard, Lise, 1984. "On price exogeneity in complete demand systems," Journal of Econometrics, Elsevier, vol. 24(3), pages 235-247, March.
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