The nonprofit, nonpartisan research organization Think Tennessee is evaluating the state’s digital divide: Think Tennessee says thousands of residents are missing out on the economic, health and educational benefits of having broadband Internet service. In some areas, it’s simply unavailable; in others, it’s unaffordable for low-income families. (EBP, the Chattanooga-owned electric utility that provided ultra-fast broadband to local residents , has expressed interest in expanding service to