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Markets, incomes, expectations : agricultural supply dynamics
[Revenus, marchés et anticipations : la dynamique de l'offre agricole]

Author

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  • Jean-Marc Boussard

    (Station d'économie et de sociologie rurales de paris - INRA - Institut National de la Recherche Agronomique)

Abstract

Dans le discours politique habituel, le soutien au revenu des agriculteurs est justifié par un souci d'équité. Pourtant, il n'y a aucune raison d'être plus équitable envers les agriculteurs qu'envers aucune autre catégorie sociale. En revanche, il existe des spécificités des marchés agricoles qui justifient le soutien aux agriculteurs en vue de protéger le consommateur des fluctuations de prix excessives engendrées par la dynamique spontanée du secteur. On montre en particulier que le jeu combiné de l'incertitude, des facteurs fixes, de l'absence d'économies d'échelle, et de la rigidité de la demande conduit logiquement un marché agricole libre à évoluer vers un régime chaotique, au sens mathématique du terme, c'est-à-dire un régime de fluctuations non périodiques auto-entretenues et imprédictibles, et cela, sans qu'il soit nécessaire de faire intervenir les "aléas climatiques" ou d'autres perturbations exogènes.

Suggested Citation

  • Jean-Marc Boussard, 1993. "Markets, incomes, expectations : agricultural supply dynamics [Revenus, marchés et anticipations : la dynamique de l'offre agricole]," Post-Print hal-02849145, HAL.
    • Handle: RePEc:hal:journl:hal-02849145
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