Vk. Smith et Ll. Osborne, DO CONTINGENT VALUATION ESTIMATES PASS A SCOPE TEST - A METAANALYSIS, Journal of environmental economics and management, 31(3), 1996, pp. 287-301
This paper considers the scope test proposed to judge the internal con
sistency of contingent valuation estimates. The test is shown to be qu
ite sensitive to the maintained hypotheses required to derive fairly p
recise expectations for the properties of WTP functions, and, therefor
e, a different approach may be needed in gauging the reliability of CV
. This paper describes an approach that relies on a weight-of-the-evid
ence criterion and uses meta-analysis to develop a systematic appraisa
l of what the economic values of changes in amenity resources are. The
approach is illustrated for the case of estimating people's willingne
ss to pay for improving (or maintaining) visibility at the national pa
rks. (C) 1996 Academic Press, Inc.