.The authors wish to note the following: "We reported an estimated 30% decrease in administrative reports of conflict and would like to correct this estimate to 25%. The original paper reported this estimate as the rounded covariate-adjusted estimated average treatment effect (−0.06) divided by the rounded unadjusted control group mean (0.20). Without the rounding error, the original estimate is 29%. Using both covariate adjusted estimates, we have an estimate of 25%. Using both unadjusted estimates, we have an estimate of 23%. The original estimate of 30% was reported in the Abstract (line 11), the Significance Statement (line 8), in the results on page 569 (left column, first paragraph, line 9), and in the discussion on page 571 (left column, first paragraph, line 6). In each of these places, we would like to replace the number 30 with 25. The estimated overall effects on administrative reports of conflict remain statistically insignificant at the α=0.05 level."Published under the PNAS license.