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Le traitement des réponses égales à zéro dans l'évaluation contingente

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  • Dominique Ami
  • Brigitte Desaigues

Abstract

[fre] L'évaluation contingente est couramment utilisée pour donner un prix aux actifs naturels. Le traitement économétrique des valeurs obtenues à l'aide de cette méthode directe de révélation des préférences pose des problèmes du fait du nombre élevé (généralement autour de 50%) de valeurs nulles. Différentes méthodes de traitement des réponses égales à zéro, dans le cas d'une question ouverte, peuvent être envisagées. Trois modèles sont étudiés, testés économétriquement et comparés : le modèle de régression linéaire, le modèle de Heckman et le modèle de Tobin. On s'interroge également sur les comportements micro-économiques sous-jacents à chacun de ces modèles. L'objectif de cet article est de montrer qu'il n'est pas pertinent d'utiliser le modèle de Tobin car les valeurs nulles ne peuvent pas être traitées uniformément comme des valeurs censurées. [eng] Analysing Responses at Zero in Contingent Valuation by Dominique Ami and Brigitte Desaigues . Contingent valuation is often used to put a price on natural assets. Econometric analysis of values obtained by this direct method of preference revelation raises problems due to the high proportion (generally around 50%) of zero values. Various methods of analysing responses at zero can be considered in the case of open-ended questions. Here three models are studied, tested econometrically and compared: the linear regression model, the Heckman model, and the Tobin model. The microeconomic attitudes underlying each of these models are also examined. The object of the paper is to show that use of the Tobin model is not relevant since zero values cannot be treated uniformly in the same way as censored values.

Suggested Citation

  • Dominique Ami & Brigitte Desaigues, 2000. "Le traitement des réponses égales à zéro dans l'évaluation contingente," Économie et Prévision, Programme National Persée, vol. 143(2), pages 227-236.
  • Handle: RePEc:prs:ecoprv:ecop_0249-4744_2000_num_143_2_6105
    Note: DOI:10.3406/ecop.2000.6105
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    References listed on IDEAS

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    1. Haab, Timothy C. & McConnell, Kenneth E., 1997. "Referendum Models and Negative Willingness to Pay: Alternative Solutions," Journal of Environmental Economics and Management, Elsevier, vol. 32(2), pages 251-270, February.
    2. Amemiya, Takeshi, 1973. "Regression Analysis when the Dependent Variable is Truncated Normal," Econometrica, Econometric Society, vol. 41(6), pages 997-1016, November.
    3. Amemiya, Takeshi, 1984. "Tobit models: A survey," Journal of Econometrics, Elsevier, vol. 24(1-2), pages 3-61.
    4. Heckman, James, 2013. "Sample selection bias as a specification error," Applied Econometrics, Publishing House "SINERGIA PRESS", vol. 31(3), pages 129-137.
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