This is a good explanation of some difficult microeconomics. I read about the individual pieces elsewhere, but I don’t have a consistent framework in which to evaluate them. This lines up well with my own metric for reductions in new housing construction, which is the number of advertising flyers for handymen stuck in my screen door — every one of those guys used to be a construction worker before the crash.
One thing that looks odd, though, is your map of missing housing units. All the biggest cities in America are conspicuously red, but I hear that cities are actually depopulating lately. How do these two things fit together?