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...

This paper focuses on contract design to improve the incentive structure of current coordination mechanisms related to sustainable land use management in the Ethiopian highlands. The main objective is to assess whether, and if so under which terms and conditions, rural households are willing to...