“…Factors other than urban population size affect service availability and well-being in rural areas, including rural population density, industrial structure, and natural amenity features (Isserman, Feser, & Warren, 2009;McGranahan, Wojan, & Lambert, 2010;Vias, Mulligan, & Molin, 2002). However, recent studies confirm that the variability of rural well-being is still very strongly tied to the structure of the urban hierarchy -places near large cities have lower poverty rates, higher incomes, more jobs, higher population growth, and better access to retail services compared with more remote areas (Partridge, Rickman, Ali, & Olfert, 2008a, 2009aPorter & Howell, 2009). Three frontier levels defined here vary by urban population size threshold (50,000, 25,000, and 2500) and are meant to describe areas with limited access to high-, intermediate-, and low-order central-place services, respectively.…”