[tmh79]

I would limit my "expertise" to rustbelt/midwestern areas, but from what I've seen in both data and experience, things tend to be more correlated with overall density metrics than specific location, and there are a lot of microscale effects. For instance, many ambitious people in the midwest are relocating from [small town they grew up in] to [regional center], like moving from avondale MI to Grand Rapids MI. The macro effects of outmigration from MI en mass show little info, but on a micro scale, people are leaving their smaller counties and moving to more dense ones. Over time, smaller regional centers like Grand Rapids grow, but the 200 miles of 'small town America' surrounding it grow older, more disconnected, less healthy, and less educated.