A Site-Portfolio Model for Multiple-Destination Recreation Trips: Valuing Trips to National Parks in the Southwestern United States
提出一种分析多目的地休闲旅行的新方法，通过将公园组合视为选择方案，评估美国西南部国家公园的旅行价值，并估算关闭公园造成的每次旅行损失。
We propose a new method for analyzing multiple-destination recreation trips and apply it to visitation at national parks in the southwestern United States. We use conventional random utility theory and treat groups of parks (portfolios) as choice alternatives. We consider one choice occasion per respondent and condition that choice on the person visiting at least one park in the choice set, so the participation decision (go/no-go) is not modeled. Trip cost includes time, travel, lodging, and food cost for visiting all sites in the portfolio. Variation in trip cost is generated by variation in the location where individuals enter and exit the southwestern region and by variation in the specific set of parks in each portfolio. We use specialized sampling weights to correct for on-site sampling. Finally, we provide estimates of per trip losses for closing one or more of the parks.