The Gentry, Misjudged as Neighbors.

This seems relatively obvious: gentrification doesn’t drive out poorer residents as a) the area is getting nicer and b) the longer they stay, the more the supply/demand differential rises and therefore the more they get when they move. This works for owners; for renters, you might expect to see a faster turnover as landlords increase rents to market levels. I don’t think you can do this in a crazy way though. Either way the process takes c. 10 years rather than c. 3 years.