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Respondent Uncertainty and Ordering Effect on Willingness to Pay for Salt Marsh Conservation in the Brest Roadstead (France)

Louinord Voltaire, Hermann Donfouet (), Claudio Pirrone and Agathe Larzilliere
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Claudio Pirrone: AMURE - Aménagement des Usages des Ressources et des Espaces marins et littoraux - Centre de droit et d'économie de la mer - IFREMER - Institut Français de Recherche pour l'Exploitation de la Mer - UBO - Université de Brest - IUEM - Institut Universitaire Européen de la Mer - IRD - Institut de Recherche pour le Développement - INSU - CNRS - Institut national des sciences de l'Univers - UBO - Université de Brest - CNRS - Centre National de la Recherche Scientifique - CNRS - Centre National de la Recherche Scientifique

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Abstract: This paper explores the potential link between the sensitivity of willingness to pay (WTP) to the order of presenting bid amounts in contingent valuation questions (ordering effect) and respondent uncertainty. The resource being valued is a public project to protect salt marshes against the spread of an invasive aquatic plant in the Brest roadstead (France). Valuation uncertainty is captured through a variant of payment card format where respondents are given the opportunity to report their WTP as either a single value (Option A) or an interval of values (Option B). The ordering effect is tested using both parametric models that ignore and control for the potential sample selection bias related to the choice between Option A and Option B, as well as non-parametric models. The results suggest that (1) respondents place substantial WTP values on salt marsh conservation, and (2) the ordering effect is linked to respondent uncertainty since only uncertain respondents react differently to changes in the order of presenting bid amounts. Specifically, for uncertain respondents, putting bid amounts in ascending order yields lower welfare estimates than putting bid amounts in descending order or random order. Policy recommendations and options to deal with ordering effect are discussed. (C) 2017 Elsevier B.V. All rights reserved.

Keywords: Contingent valuation; Payment card format; Preference uncertainty; Ordering effect; Salt marsh conservation (search for similar items in EconPapers)
Date: 2017-07
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Citations: View citations in EconPapers (7)

Published in Ecological Economics, 2017, 137, pp.47-55. ⟨10.1016/j.ecolecon.2017.02.029⟩

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Persistent link: https://EconPapers.repec.org/RePEc:hal:journl:hal-02149952

DOI: 10.1016/j.ecolecon.2017.02.029

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