At the peak of the recent housing boom, subprime mortgage companies were loaning $600 billion per year to homebuyers with poor credit histories. In The Political Economy of the Subprime Mortgage Credit Expansion (NBER Working Paper No.16107), co-authors Atif Mian, Amir Sufi, and Francesco Trebbi explore the links between the rapid growth of the subprime industry and Congressional politics and policy. Focusing on the period between 2002 and 2007, they document a sharp increase in campaign contributions and lobbying activity by the mortgage industry. Using data from the Center for Responsive Politics, the researchers find that the industry's campaign contributions increased somewhat between 1998 and 2002. But they began to accelerate rapidly in 2002, and rose by 80 percent between 2002 and 2006. Moreover, the study finds that these contributions were targeted to members of Congress whose districts included a large fraction of subprime borrowers.
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