9-12-2012: Boston, MA: Two well known Harvard economists, Larry Summers (center) and Greg Mankiw (right) took part in a forum held on the campus of Northeastern University, talking about their views on the recovery and tax policy. The event was moderated by former Massachusetts governor Michael S. Dukakis (backround left). This photo was taken just after Summers arrived a little late for the event and he was saying hello to Mankiw. section: business (Globe Staff Photo/Jim Davis