How much does childhood neighborhood quality affect test scores and earnings?
Core argument: Estimated neighborhood effects are three times more potent at the zip code level, where 20 years of exposure to a one county-level standard deviation better zip code raises college-going by 6.7 percentage points, SAT composite scores by 38 points, and age-25 income percentile by 6.1 points.
Using the quasi-random assignment of 760,000 children in U.S. military families, we show that neighborhood attributes experienced during childhood have powerful impacts on SAT scores, college-going and earnings. Twenty years of exposure in a 1 standard deviation "better" county raises SAT composite scores by 10 points (1.8 percentiles), raises college attendance by1.7 percentage points, earnings by 2.2 percentile points, and lowers EITC receipt by 10%. Impacts are three times more potent when we measure neighborhood quality at the zip code level:twenty years of exposure to a one (county level) standard deviation better zip code raises college going by 6.7 percentage points, SAT composite by 38 points and income percentile at age 25 by 6.1 points. The same locations benefit children with equal potency across race or sex [see Fig. 7]. The striking similarity in estimated neighborhood effects across groups has potentially important implications for understanding how the effects of place might influence group-based inequalities. Random assignment to place cuts the black-white gap in earnings from a hypothetical 4.8% down to the observed 3.7% or a 23% reduction.


