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Cohérence dans les systèmes de notation des experts-dégustateurs en vin - Revue de la littérature et nouveaux résultats. Œnométrie XIII - Bordeaux - 26 et 27 Mai 2006

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  • Philippe Barbe

    (AGM - Laboratoire Analyse, Géométrie et Modélisation - CNRS - Centre National de la Recherche Scientifique - Université de Cergy Pontoise)

  • Evens Salies

    () (OFCE - OFCE - Sciences Po)

Abstract

Cette étude aborde la question de la cohérence des notes des experts dégustateurs en vin. Chacun sait l'importance que peuvent avoir leurs notes sur les comportements d'achat de certains consommateurs et sur les décisions des viticulteurs qui attendent leur publication pour fixer le prix de sortie des vins primeurs. Des études hédonistiques ont montré qu'il existait des différences significatives entre ces experts aussi bien dans le marché des primeurs qu'à l'aveugle après mise en bouteille. Alors que certains clament l'infaillibilité des experts, d'autres, trouvent que leurs notes sont peu corrélées. Dans ce papier nous nous intéressons à la cohérence du système de notation de deux experts fameux : R. Parker et F. Dubourdieu. Nous considérons un millésime pour lequel il n'y a pas ou peu de désaccord : l'excellent 1989 pour un échantillon de grands vins de Bordeaux. Nous proposons une mesure de cohérence inter-temporelle du système de notation de chaque expert dans un cadre paramétrique (β-convergence) et non-paramétrique (Cronbach-α). Puis, nous testons la cohérence inter-personnelle, c'est-à-dire entre les notations des deux experts pour ce même millésime (Spearman, Cronbach-α). Nous évaluons ensuite cette cohérence dans le cadre de modèles multivariés conditionnels à partir desquels nous testons si les différences de notation reflètent des préférences pour des caractéristiques objectives relatives à l'assemblage et l'élevage.

Suggested Citation

  • Philippe Barbe & Evens Salies, 2006. "Cohérence dans les systèmes de notation des experts-dégustateurs en vin - Revue de la littérature et nouveaux résultats. Œnométrie XIII - Bordeaux - 26 et 27 Mai 2006," Post-Print hal-01053510, HAL.
  • Handle: RePEc:hal:journl:hal-01053510 Note: View the original document on HAL open archive server: https://hal-sciencespo.archives-ouvertes.fr/hal-01053510
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