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Working Paper
Access to Refinancing and Mortgage Interest Rates: HARPing on the Importance of Competition
We explore a policy-induced change in borrower ability to shop for mortgages to investigate whether market competitiveness affects mortgage interest rates. Our paper exploits a discontinuity in the competitive landscape introduced by the Home Affordable Refinancing Program (HARP). Under HARP, lenders that currently service loans eligible for refinancing enjoyed substantial advantages over their potential competitors. Using a fuzzy regression discontinuity design, we show a jump in mortgage interest rates precisely at the HARP eligibility threshold. Our results suggest that limiting ...