> How is adding more supply going to fix this? How could it not? > How do you prevent over-supply from being built? How do you ensure that the housing is of s

> How is adding more supply going to fix this? How could it not? > How do you prevent over-supply from being built? How do you ensure that the housing is of suitable quality? How do we prevent the over-supply of anything? How do we ensure the quality of anything in the market? Housing is not a unique good. This is a solved problem. > a friend recently visited and used airbnb to lodge at one of those newish buildings on 9th street. The building looks great on the outside. But, inside, the units looked and felt like what I imagine Soviet block style buildings would be like. And what's the vacancy rate on that building? Just because you don't like it doesn't mean it's not serving a market niche.