The research shows a clear trend of the desirable cities becoming even more desirable, to the point where it's almost a necessity for city planners to lure college graduates or face decline.
I drew a different conclusion from this article. I know the article's focus was on attracting college graduates so that the city can prosper, but I instead considered the contrapositive: If a city is not prospering, then it has a lower-than-average percentage of college graduates. I see it as another confirmation of residential segregation.
More and more, there is becoming a "separate and not equal" divide in communities based on their socioeconomic status. As a teacher, I see it all the time in schools: there are some schools that leverage the taxpayer for new buildings, new technology, higher salaries, and less stressful work environments, while many others struggle due to an inability to levy. Instead of governments focusing on what to do about producing and/or attracting college graduates, perhaps it should instead consider what to do about the absence of them in their community.