I actually researched it, and it's strongly correlated with the rising urbanism. Jobs are getting more and more concentrated in large metro areas, leaving smal

I actually researched it, and it's strongly correlated with the rising urbanism. Jobs are getting more and more concentrated in large metro areas, leaving smaller cities to whither. And once you're in a large city, you have fewer reasons to move. Jobs are there, and likely close to each other. So even if you change a job, you probably don't _need_ to move. This, of course, drives up the price of real estate. People want to be close to there the jobs are, so they compete for the limited space in proximity to large metros. Thus making companies more likely to relocate (or open) their businesses there. Rinse, wash, repeat. This is not healthy. We are again nearing the historical record for the number of housing units per capita or per household, far more than in the 80-s or 70-s. Yet we're somehow in a "housing crisis".