From the NBER:
Predatory Lending and the Subprime Crisis, by Sumit Agarwal, Gene Amromin, Itzhak Ben-David, Souphala Chomsisengphet, Douglas D. Evanoff, NBER Working Paper No. 19550 Issued in October 2013: We measure the effect of an anti-predatory pilot program (Chicago, 2006) on mortgage default rates to test whether predatory lending was a key element in fueling the subprime crisis. Under the program, risky borrowers and/or risky mortgage contracts triggered review sessions by housing counselors who shared their findings with the state regulator. The pilot cut market activity in half, largely through the exit of lenders specializing in risky loans and through decline in the share of subprime borrowers. Our results suggest that predatory lending practices contributed to high mortgage default rates among subprime borrowers, raising them by about a third.