On‐Site Time in the Demand for Recreation
探讨旅行成本模型中现场时间的处理方式，分析现场时间内生或外生假设下的需求函数形式，并说明标准估计与福利计算仍适用。
Abstract The standard travel cost model has treated on‐site time ambiguously over the years. This paper shows how to handle on‐site time by exploring the implications of two assumptions in the travel cost model: first, people choose the amount of time that they spend on a site, and second, the time spent on‐site is exogenous. This paper uses a duality result to show that when on‐site time is chosen, the standard travel cost demand function takes a particularly simple form. With slight modification, standard estimation and welfare calculations continue to hold.