Based upon data from a resident survey, the U.S. Census, and official homicide reports from Chicago, Sampson et al. found that neighborhood collective efficacy directly affects perceived neighborhood violence, household victimization, and homicide rates. In addition, they reported that the relationship between residential stability and concentrated disadvantage with each measure of violence is mediated after adding their collective efficacy measure to the regression models. This article uses Earls, Brooks-Gunn, Raudenbush, and Sampson's archived data collection and other archived data collections to assess the extent to which Sampson et al.'s core substantive findings are independently reproducible. Although the reanalysis identified some differences between the archived data and the information provided in Sampson et al., the reanalysis produced findings in the same reported direction and statistical significance for virtually all of Sampson et al.'s core substantive outcomes. This confirmation of their key conclusions provides added confidence in their collective efficacy thesis and enhances the prospects for extending it by assessing the degree to which it also affects other crime types and whether these effects persist over time. (publisher abstract modified)
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