I don't buy it. One thing that stands out to me: he has a ton of charts, but this crucial bit: >But, since 2008, vacancies have been declining steeply. is missing one. It looks like this statement is based on his estimates. So... original research. I'll leave it to an actual statistician to analyze his methodology, but that statement doesn't jive with my experience. I continue to suspect that the "housing shortage" (…
The "housing shortage" is due to a shortage of housing. This is entirely self-inflicted by various cities that have illegalized all the easy ways of increasing density (see San Francisco for the reductio ad absurdum case), at the prompting of deeply NIMBY voters who oppose anything that will increase construction regardless of claimed political beliefs.
What you just said might be absolutely true in the US. However, housing is at historic levels everywhere in the developed world. How do you explain that? Surely not all cities in the world made the same mistakes?