"Static cities"

Describes two of our favorite cities, Portland and Philly.

I'm not so sure about Boston, though. Over the last few decades, academia has flourished and boomed here, with numerous universities and colleges adding to their numbers. I could imagine that a good portion of the "domestic" outflow could be that US citizens move in as college students [do they count as "domestic" immigrants?], stay around for a few years after graduation and then move back out--usually close to back home--at which time they will definitely count as "domestic". Moreover, there are plenty of academic researchers who come to Boston as non-citizens, attain their citizenship while working here, and then find faculty positions outside of the area--thereby further skewing Boston's numbers of non-citizen immigrants and citizen outflow.