英文文献：Estimating The Opportunity Cost Of Recreation Time In An Integrable 2-Constraint Count Demand Model-在可积2约束计数需求模型中估计娱乐时间的机会成本
英文文献作者：Larson, Douglas M.,Lew, Daniel K.,Shaikh, Sabina L.
英文文献摘要：
How researchers treat the opportunity cost of time substantially influences recreation demand parameter and welfare estimates. This paper presents a utility-theoretic and implementable approach, estimating the shadow value of time jointly with recreation demands for coastal activities, using a generalization of the semilog demand system in a two-constraint model.

研究人员如何对待时间的机会成本，实质上影响着娱乐需求参数和福利估计。摘要利用双约束模型中半对数需求系统的泛化，提出了一种实用的海岸活动休闲需求与时间阴影值的联合估计方法。