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Respondent Certainty and Payment Vehicle Effect in Contingent Valuation: an Empirical Study for the Conservation of Two Endangered Species in Zakynthos Island, Greece

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  • Stithou, Mavra
Abstract
This paper focuses on providing evidence of what explains respondent certainty by assessing at the same time the sensitivity of the Contingent Valuation Method (CVM) to payment vehicle effect. Two different samples were collected from local residents and foreign visitors of the Zakynthos Island in Greece and a split-sample approach was employed. The elicited conservation values concerned two endangered species, the loggerhead turtle, Caretta caretta and the monk seal, Monachus monachus. In terms of policy implications, the stated Willingness-to-Pay (WTP) values confirmed that there is a potential for a range of internal funding options, which could sustain the future operation of the existing National Marine Park of Zakynthos (NMPZ). From a methodological point of view, the study explores the determinants of self-reported certainty with regard not only to different payment modes but also to attitudinal and socio-economic variables and adds evidence to the debate about the validity of CVM by testing the presence of a payment vehicle effect. The results show evidence of sensitivity of the method to the mode of payment and reveal a relationship between the chosen payment vehicle and respondents' degree of certainty.

Suggested Citation

  • Stithou, Mavra, 2009. "Respondent Certainty and Payment Vehicle Effect in Contingent Valuation: an Empirical Study for the Conservation of Two Endangered Species in Zakynthos Island, Greece," Stirling Economics Discussion Papers 2009-21, University of Stirling, Division of Economics.
    • Handle: RePEc:stl:stledp:2009-21
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    File URL: http://hdl.handle.net/1893/1668
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    3. Akcura, Elcin, 2015. "Mandatory versus voluntary payment for green electricity," Ecological Economics, Elsevier, vol. 116(C), pages 84-94.
    4. Brander, Luke & Eppink, Florian & Hof, Christine Madden & Bishop, Joshua & Riskas, Kimberly & Goñi, Victoria Guisado & Teh, Lydia & Teh, Louise, 2024. "Turtle Economic Value: The non-use value of marine turtles in the Asia-Pacific region," Ecological Economics, Elsevier, vol. 219(C).
    5. Baulcomb, Corinne & Böhnke-Henrichs, Anne, 2014. "A Review of the Marine Economic Valuation Literature 1975 – 2011: Classifying Existing Studies by Service Type, Value Type, and Valuation Methodology," Working Papers 190935, Scotland's Rural College (formerly Scottish Agricultural College), Land Economy & Environment Research Group.

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    Keywords

    Respondent Certainty; Polychotomous Choice; Payment Vehicle Effect; Biodiversity Conservation; Contingent Valuation; National Marine Park of Zakynthos (Greece);
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