Sampling and Aggregation Issues in Random Utility Model Estimation
探讨随机效用模型估计中，个体选择集的不同设定（如全部备选项、少数热门选项或空间加总选项）如何影响非市场价值的测量结果，提醒研究者审慎处理这一主观判断。
Abstract Measurement of nonmarket values often involves subjective judgments. Since these judgments may influence results, they should be carefully considered. I focus on an aspect of subjective choice relating to the estimation of random utility models. Such models require specification of each recreationalist's choice set. Whether an individual perceives his choice set as composed of all possible alternatives, a few popular alternatives, or collections of spatially aggregated alternatives is an important judgment affecting the conclusions.