Editor: David Reiss
Brooklyn Law School

October 20, 2017

The Long-Term Effects of Redlining

By David Reiss

Daniel Aaronson et al. have posted The Effects of the 1930s HOLC “Redlining” Maps to SSRN. The paper provides empirical support for the argument that discriminatory government policies have consequences that can last for decades, including increased segregation. The abstract reads,

In the wake of the Great Depression, the Federal government created new institutions such as the Home Owners’ Loan Corporation (HOLC) to stabilize housing markets. As part of that effort, the HOLC created residential security maps for over 200 cities to grade the riskiness of lending to neighborhoods. We trace out the effects of these maps over the course of the 20th and into the early 21st century by linking geocoded HOLC maps to both Census and modern credit bureau data. Our analysis looks at the difference in outcomes between residents living on a lower graded side versus a higher graded side of an HOLC boundary within highly close proximity to one another. We compare these differences to “counterfactual” boundaries using propensity score and other weighting procedures. In addition, we exploit borders that are least likely to have been endogenously drawn. We find that areas that were the lower graded side of HOLC boundaries in the 1930s experienced a marked increase in racial segregation in subsequent decades that peaked around 1970 before beginning to decline. We also find evidence of a long-run decline in home ownership, house values, and credit scores along the lower graded side of HOLC borders that persists today. We document similar long-run patterns among both “redlined” and non-redlined neighborhoods and, in some important outcomes, show larger and more lasting effects among the latter. Our results provide strongly suggestive evidence that the HOLC maps had a causal and persistent effect on the development of neighborhoods through credit access.

The paper’s conclusion is just as interesting:

That the pattern begins to revert starting in the 1970s is at least suggestive that Federal interventions like the Fair Housing Act of 1968, the Equal Credit Opportunity Act of 1974, and the Community Reinvestment Act of 1977 may have played a role in reversing the increase in segregation caused by the HOLC maps. . . . We believe our results highlight the key role that access to credit plays on the growth and long-running development of local communities. (33)

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