Convergent Validity and the Time Consistency of Preferences: Evidence from the Iowa Lakes Recreation Demand Project
利用爱荷华湖项目多年、多湖泊的休闲使用数据，检验个体对水质变化的反应在显示偏好与陈述偏好之间是否收敛，以及偏好随时间是否一致。
We examine the consistency of preferences over time and as implied by revealed versus stated preference (contingent behavior) data. Studies in this area are typically based upon a single site and focus on consumer response to changes in travel cost or site access. We use data from the Iowa Lakes Project, which provides information on usage patterns over several years and for 132 lakes, along with detailed water quality data. This allows us to test for convergence in how individuals respond to changing site characteristics, as well as the consistency of preferences over time and between actual versus contingent trips. <i></i>