Barry Bluestone, director of the Kitty and Michael Dukakis Center for Urban and Regional Policy at Northeastern University, expects steady but moderate price increases for single-family homes in the Boston area over the next few years, as more people put their homes on the market. Bluestone said he expects prices for multifamily homes and condominiums to rise even faster. “Older baby boomers are going to look to downsize and younger professionals will be less interested in moving into the suburbs and having to put up with long, tedious commutes,” he said.