According to a new Pew Charitable Trusts poll, 39 percent of the residents of the Philadelphia suburbs rated Philadelphia a good or excellent place to live. David Elesh, an associate professor of urban sociology at Temple, said he expected that number would rise. In fact, according to Elesh, the city's growth since 2003 is partly the result of "suburbanites who'd rather live in the city." While many of those shedding the McMansions may be baby boomers, younger people increasingly are moving into city digs as well, and Philadelphia "has been more successful at keeping these people than they have in the past," Elesh said.