NetProspex, a sales and marketing database company, has released its annual "Social Business Report," which analyzes the social media activity and connectedness of cities, industries, and businesses.

Among other findings, NetProspex ranks the top 50 "most social cities" in the United States--the cities with the "most social businesspeople"--based on a metric system called "NetProspex Social Index (NPSI)", which measures activity across nine major social networks, including Facebook, Twitter, and LinkedIn. NetProspex notes that the score takes into account "social presence," measured by "the number of employees with social media profiles across Twitter, Linkedin, or Facebook using a company email address," and "social connectedness," determined by tracking "the number of connections across social networks, including Twitter followers, Facebook friends, and LinkedIn connections."