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Eliciting Willingness†to†Pay through Multiple Experimental Procedures: Evidence from Lab†in†the†Field in Rural Ghana

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  • A. Banerji
  • Shyamal Chowdhury
  • Hugo De Groote
  • J. V. Meenakshi
  • Joyce Haleegoah
  • Manfred Ewool

Abstract

This paper has the objectives of (a) comparing estimated willingness†to†pay (WTP) across three elicitation mechanisms (a Becker†DeGroot†Marschak [BDM] auction, a kth price auction, and a choice experiment [CE]) and (b) examining how these vary by participation fee. The product under consideration is kenkey made with nutritious maize, biofortified with vitamin A, which gives it a distinct orange color, in contrast to the white and yellow varieties that are traditionally consumed. We use an experiment consisting of 14 treatment arms, conducted in rural Ghana. Our estimation strategy explicitly accounts for the censored (typically at the market price) nature of the bids in the auctions, and the apparently lexicographic choices of several individuals in the CE. We find no evidence of economically meaningful (defined by the minimum currency unit of five pesewas) differences in WTP (although they may be statistically significant) across elicitation mechanisms, or by participation fee, a result that is in contrast to that found in much of the literature. A secondary finding is that the provision of nutrition information positively and significantly affects the marginal WTP for the new maize.Cet article a comme objectif de (a) comparer la volonté estimée de payer parmi trois mécanismes de sollicitation (enchères BDM, enchères Ke prix et expérimentation des choix) et (b) examiner leur variance par droits de participation. Le produit examiné est le kenkey fait de maïs nutritif dont la couleur orange distincte est obtenue grâce à sa teneur plus élevée en vitamine A, en contraste aux variétés blanches et jaunes traditionnellement consommées. Une expérimentation à quatorze groupes de traitements a été menée en Ghana rural. La stratégie d'estimation tient explicitement compte de la nature confidentielle des offres aux enchères (typiquement à la valeur marchande) et des choix apparemment lexicographiques de nombreux individus dans l'expérimentation des choix. Aucune preuve de différences économiques significatives (définie par l'unité de référence de cinq pesewas) à la volonté de payer (qui pourraient tout de même s'avérer statistiquement significatives) parmi les mécanismes de sollicitation ni par droits de participation n'a été trouvée, ce résultat contrastant à ceux présentés dans la littérature. Une deuxième conclusion veut que fournir les informations nutritives affecte considérablement le consentement marginal à payer pour le nouveau maïs.

Suggested Citation

  • A. Banerji & Shyamal Chowdhury & Hugo De Groote & J. V. Meenakshi & Joyce Haleegoah & Manfred Ewool, 2018. "Eliciting Willingness†to†Pay through Multiple Experimental Procedures: Evidence from Lab†in†the†Field in Rural Ghana," Canadian Journal of Agricultural Economics/Revue canadienne d'agroeconomie, Canadian Agricultural Economics Society/Societe canadienne d'agroeconomie, vol. 66(2), pages 231-254, June.
  • Handle: RePEc:bla:canjag:v:66:y:2018:i:2:p:231-254
    DOI: 10.1111/cjag.12147
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    References listed on IDEAS

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    3. Groote, Hugo De & Munyua, Bernard & Traore, Djibril & Taylor, John R. N. & Ferruzzi, Mario & Ndiaye, Cheikh & Onyeoziri, Isiguzoro O. & Hamaker, Bruce R., 2021. "Measuring consumer acceptance of instant fortified millet products using affective tests and auctions in Dakar, Senegal," International Food and Agribusiness Management Review, International Food and Agribusiness Management Association, vol. 24(3), March.

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