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Federal Reserve Bank of Philadelphia
Working Papers
Appraising Home Purchase Appraisals
Paul S. Calem
Lauren Lambie-Hanson
Leonard I. Nakamura
Jeanna Kenney
Abstract

Home appraisals are produced for millions of residential mortgage transactions each year, but appraised values are rarely below the purchase contract price: Some 30% of appraisals in our sample are exactly at the home price (with less than 10% of them below it). We lay out a basic theoretical framework to explain how appraisers’ incentives within the institutional framework that governs mortgage lending lead to information loss in appraisals (that is, appraisals set equal to the contract price). Consistent with the theory, we observe a higher frequency of appraisal equal to contract price and a higher incidence of mortgage default at loan-to-value boundaries (notches) above which mortgage insurance rates increase. Appraisals appear to be less informative for default risk measurement compared with automated valuation models.


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Paul S. Calem & Lauren Lambie-Hanson & Leonard I. Nakamura & Jeanna Kenney, Appraising Home Purchase Appraisals, Federal Reserve Bank of Philadelphia, Working Papers 18-28, 27 Dec 2018.
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Keywords: information; mortgage; regulation; appraisal; mortgage default; foreclosure
DOI: 10.21799/frbp.wp.2018.28
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