Recreation dependent counties are determined by a weighted index of three measures: 1. Jobs; 2. Earnings in the following: entertainment, recreation, accommodations, eating/drinking places, and real estate; and 3. the share of vacant housing units intended for seasonal/occasional use. Recreation counties are those with a score of more than one deviation above the mean. Sourse: USDA, Economic Research Service using data from Bureau of Economic Analysis and U.S. Census Bureau