PT - JOURNAL ARTICLE AU - Bayham, Jude AU - Enriquez, Aaron J. AU - Richardson, Leslie TI - Are mobile device location data a substitute for travel cost surveys? AID - 10.3368/le.102.3.012626-0015 DP - 2026 Mar 11 TA - Land Economics PG - 012626-0015 4099 - http://le.uwpress.org/content/early/2026/03/05/le.102.3.012626-0015.short 4100 - http://le.uwpress.org/content/early/2026/03/05/le.102.3.012626-0015.full AB - Mobile device location data offer a low-cost alternative for measuring visitation to outdoor recreation sites and are known to correlate with official visitation counts. Less is known about whether these data can recover recreation demand and consumer surplus comparable to surveybased methods. We compare travel cost models estimated using mobile device and survey data for 17 U.S. National Park Service sites. Results are mixed. We examine the roles of aggregation and sampling bias and use LASSO regression to assess whether sample and site characteristics explain discrepancies.