Some affordable housing resources

Here's a paper by a couple of economists arguing that affordable housing set asides have hurt southern California's housing supply.  (I'll bet that's true, but I think their analysis is pretty weak.  Here's a paper criticizing their conclusions.)  I point this out because they show (pp. 4-5) that relatively few affordable units have been built under these programs. 

Here's a paper prepared for HUD on affordable set aside programs nationwide.  Check out p. 6, which summarizes average annual production of affordable units in several major cities.  (Very few, at least in the most expensive places.)

Here's another paper prepared by HUD summarizing how municipal land-use regulations hurt  affordable housing.

Here's another paper by HUD examining the impact of federal regulations on affordable housing.  This paper is interesting because it shows that even seemingly trivial federal regulations (e.g., the Real Estate Settlement Procedures Act or energy-efficiency requirements for air conditioners) can have a non-trivial impact on affordability.