Randomly Drawn Opportunity Sets in a Random Utility Model of Lake Recreation
针对休闲需求研究中面临大量休闲地点导致估计困难的问题，本文采用随机抽取少量地点（如11个）加上个人实际选择的地点来估计行为模型，为处理大规模选择集提供了可行方法。
Random Utility Models are widely applied in studies of recreation demand. The model is particularly useful when the number of recreation sites from which individuals may choose is large. Yet, when the number gets too large, say in the hundreds, estimation becomes burdensome. We present an analysis suggested by McFadden (1978) for dealing with large numbers of sites. We estimate a model using randomly drawn opportunity sets. We use each person's chosen site plus a random draw of as few as eleven other sites (when hundreds are available) to estimate a plausible behavioral model.