Spatial Preference Heterogeneity: A Choice Experiment
通过选择实验评估流域内水质改善空间分布的偏好异质性，发现忽略空间异质性会低估从子流域到全流域的福利加总。
The main objective is to assess preference heterogeneity related to the spatial distribution of water quality improvements throughout a river basin. In a choice experiment, the river basin’s hydrogeographical units and the levels of water quality improvement are included as attributes in the experimental design. Changes in water quality throughout the river basin are visualized with maps and modeled simultaneously in relation to where respondents live, in a random utility model. Not accounting for spatial preference heterogeneity results, in this case study, in an underestimation of welfare when aggregating willingness-to-pay values from subbasins to the river basin as a whole. <i></i>