Closely Related Good Prices in the Travel Cost Model
在旅行成本模型中纳入现场时间、现场消费等密切相关商品的价格，并估计劳动市场非均衡模型，发现扩展模型下消费者剩余为每趟69美元，而传统模型仅为45美元。
Abstract This travel cost demand study included prices for closely related goods such as money and time costs of on‐site time, on‐site purchases, and other trip activities. A disequilibrium labor market model was estimated. The sample was mainly composed of persons who did not substitute earned income for leisure time. The few persons who had the capability to substitute time for money were excluded from the sample. Consumer surplus was estimated to be $@@‐@@69 per trip using the expanded model. A model using only the conventional travel cost variables resulted in estimated surplus per trip of $@@‐@@45.