Schaafsma, Marije; Brouwer, Roy; Rose, John - In: Ecological Economics 79 (2012) C, pp. 21-31
Many studies in the stated preference literature on environmental valuation do not include the effects of substitutes and distance in willingness-to-pay (WTP) models, in spite of the relevance of these effects in aggregation and benefit transfer. Heterogeneity in the availability of substitutes...