I don't know how much I buy this. Washington, DC added about 60,000 units between 2015 and now, so a little less proportionally to Austin (with 1 million residents vs 650k). Metro area, 160k more in DC, with a population of 3 million (vs 2.5 million in Austin). Even if DC's unit add is slower than Austin's, you'd expect median rent changes to be within the ballpark, right? Maybe only a slight increase instead of the small decrease Austin saw?

No. Rent doubled.

I don't know if Austin or DC is an outlier, but considering how many states sued property managers and their rental management software providers over price-fixing, I'm leaning toward Austin. In the rest of the country, building more doesn't lower rents. Lowering rents lowers rents. And you have to force landlords to do so.