In developing countries contingent valuation (CV) has become an important tool for estimating willingness to pay (WTP). So far, however, the CV studies usually have not assessed the validity of the WTP estimates mainly due to ambiguities in the criteria for scope sensitivity analysis. In this...

Benefits of reduced morbidity are important information for cost-benefit analyses of air pollution control policies. With an increasing number of morbidity valuation studies, policymakers are facing some difficulty handling the accumulated information. This article uses a meta-analysis to attain...