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. 2021 Jan 27;129(1):017006. doi: 10.1289/EHP7495

Figure 1.

Figures 1A to 1C are histograms titled Propensity to be Grade B among eligible Grade A and B polygons, Propensity to be Grade C among eligible Grade B and C polygons, and Propensity to be Grade D, among eligible Grade C and D polygons, plotting density, ranging from 0 to 4 in increments of 1, 0.0 to 2.0 in increments of 0.5, and 0 to 4 in increments of 1 (y-axis) across propensity score, ranging from 0.0 to 1.0 in increments of 0.2, respectively.

Nonrestricted propensity score distributions for 1940s U.S. Census tracts comparing HOLC better-graded tracts to worse-graded tracts. Propensity scores of the worse-graded group are shaded darker. (A) Propensity to be Grade B among Grades A and B HOLC neighborhoods; (B) propensity to be Grade C among Grades B and C HOLC neighborhoods; and (C) propensity to be Grade D among Grades C and D neighborhoods. Subsequent propensity score restriction cutoffs (1st and 99th percentiles) are indicated by the dashed lines. Note: HOLC, Home Owners’ Loan Corporation.