Posted on17 April 2015.
Fraudulent Income Overstatement on Mortgage Applications During the Credit Expansion of 2002 to 2005
Atif R. Mian
Princeton University – Department of Economics; Princeton University – Woodrow Wilson School of Public and International Affairs; NBER
University of Chicago – Booth School of Business; NBER
April 6, 2015
Kreisman Working Papers Series in Housing Law and Policy No. 21
Academic research, government inquiries, and press accounts show extensive mortgage fraud during the housing boom of the mid-2000s. We explore a particular type of mortgage fraud: the overstatement of income on mortgage applications. We define “income overstatement” in a zip code as the growth in income reported on home-purchase mortgage applications minus the average IRS-reported income growth from 2002 to 2005. Income overstatement is highest in low credit score, low income zip codes that Mian and Sufi (2009) show experience the strongest mortgage credit growth from 2002 to 2005. These same zip codes with high income overstatement are plagued with mortgage fraud according to independent measures. Income overstatement in a zip code is associated with poor performance during the mortgage credit boom, and terrible economic and financial economic outcomes after the boom including high default rates, negative income growth, and increased poverty and unemployment. From 1991 to 2007, the zip code-level correlation between IRS-reported income growth and growth in income reported on mortgage applications is always positive with one exception: the correlation goes to zero in the non-GSE market during the 2002 to 2005 period. Income reported on mortgage applications should not be used as true income in low credit score zip codes from 2002 to 2005.
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