Extending the scope of the scope test in choice experiment studies (original) (raw)

An external scope test is developed and applied to a CE study of nature protection to investigate respondents' sensitivity to scope in relation to substitutes to the project in question. Most of the literature within this field is based on CVM, and scope tests related to increases in the amount of specific goods, e.g. number of endangered species, or scope related to geographical scale. Withinproject scope tests are often captured in CE as internal scope. In the present study the external scope test at project level is performed by telling respondents in N-1 splits that the specific project is only one in a series of specific projects to be implemented. Information on other nature restoration projects which will be implemented prior to the project in question is given as well, as a reminder of the scale context. Furthermore, detailed follow-up questions were included to evaluate whether respondents were indeed aware of the scale context in which they stated their choices. Answers to these follow-up questions are used to increase the strength of the external scope test. As a whole, the set-up and the scope analyses are new to the literature, and demonstrate the possible fragility of also the CE method in securing scope sensitivity on a large scale. More importantly, the results also indicate the potential of a suitable and detailed debriefing with follow-up questions for the general accuracy of estimates and more specifically for scope test results. phone: +45 35 28 15 35. Affiliations as follows: a) Danish Centre for Forest, Landscape and Planning,

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