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Testing the effectiveness of the oath script in reducing the hypothetical bias in the Contingent Valuation Method

Author

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  • Tiziana DE-MAGISTRIS

    (Centro de Investigación y Tecnología Agroalimentaria de Aragón (CITA), Gobierno de Aragón, Zaragoza, Spain and Instituto Agroalimentario de Aragón-IA2, (CITA-Universidad de Zaragoza), Zaragoza, Spain)

  • Faical AKAICHI

    (Land Economy Environment and Society, Scotland's Rural College (SRUC), Edinburgh, United Kingdom)

  • Kamel BEN YOUSSEF

    (Université Paris Quest Nanterre La Défense, UFR-SEGMI, Nanterre, France)

Abstract

The objective of the study is to investigate the effect of the oath script (HO) in an hypothetical Contingent Valuation survey in a Mediterranean country (e.g. Italy). Hence, there were conducted the CE surveys with three treatments: (1) CV without a cognitive task, (2) CV with a CT script, and (3) CV with a HO. The findings showed that the effectiveness of the HO script depends on the participants' socio-demographic characteristics. For instance, it was found that the HO script could help to reduce the hypothetical bias for people who possess a high educational level in contrast with those people with low education and low income. Hence, the findings suggest that the oath script not only does not a guarantee the reduction of the hypothetical bias, but it also does not explain the mixed results found in the previous studies.

Suggested Citation

  • Tiziana DE-MAGISTRIS & Faical AKAICHI & Kamel BEN YOUSSEF, 2016. "Testing the effectiveness of the oath script in reducing the hypothetical bias in the Contingent Valuation Method," Agricultural Economics, Czech Academy of Agricultural Sciences, vol. 62(8), pages 378-384.
    • Handle: RePEc:caa:jnlage:v:62:y:2016:i:8:id:174-2015-agricecon
    DOI: 10.17221/174/2015-AGRICECON
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    References listed on IDEAS

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    1. Glynn T. Tonsor & Robert S. Shupp, 2011. "Cheap Talk Scripts and Online Choice Experiments: "Looking Beyond the Mean"," American Journal of Agricultural Economics, Agricultural and Applied Economics Association, vol. 93(4), pages 1015-1031.
    2. James Murphy & P. Allen & Thomas Stevens & Darryl Weatherhead, 2005. "A Meta-analysis of Hypothetical Bias in Stated Preference Valuation," Environmental & Resource Economics, Springer;European Association of Environmental and Resource Economists, vol. 30(3), pages 313-325, March.
    3. de-Magistris, Tiziana & Pascucci, Stefano, 2014. "The effect of the solemn oath script in hypothetical choice experiment survey: A pilot study," Economics Letters, Elsevier, vol. 123(2), pages 252-255.
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