Could you name some of the run-down neighborhoods next to campuses? I don't see it, unless there are some Yale campuses in Fields Corner that I don't know about.
The misconception is that Boston is this global city of about 4.5 million people living in academic utopia when it's a really smaller city of 600,000 people, where even a smaller percentage are actually living in ivory towers. The rest of the 4.5 million people live in typical post-industrial New England towns surrounding Boston such as Lynn, Revere and Quincy.