Groupon founders preventing urban ‘brain drain’ By Posted October 23, 2013 In Groupon Groupon founders preventing urban ‘brain drain’2013-10-232013-10-23/wp-content/uploads/2017/06/logo-bw-2-1.pngEric Lefkofsky | Entrepreneur & Philanthropist/wp-content/uploads/2017/06/logo-bw-2-1.png200px200px 0