What is holding back housing?

There are two major factors constraining the homeownership rate today: limited supply relative to net household formation and restricted credit availability. In this paper, we carefully document each of these factors, arguing that is is very difficult to fix the supply issues, as so much of the problem is local zoning laws, while steps can be taken to fix the credit availability issues. The supply/demand imbalance is currently the more significant of the two problems, as it places upward pressure on both home prices and rents. [ABSTRACT FROM AUTHOR]