Beyond Treatment Effects: Estimating the Relationship Between Neighborhood Poverty and Individual Outcomes in the MTO Experiment

Jeffrey B. Liebman (), Lawrence F. Katz () and Jeffrey Kling
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Jeffrey Kling: Princeton U

Working Paper Series from Harvard University, John F. Kennedy School of Government

Abstract: Several important social science literatures hinge on the functional relationship between neighborhood characteristics and individual outcomes. Although there have been numerous non-experimental estimates of these relationships, there are serious concerns about their reliability because individuals self-select into neighborhoods. This paper uses data from HUD’s Moving to Opportunity (MTO) randomized housing voucher experiment to estimate the relationship between neighborhood poverty and individual outcomes using experimental variation. In addition, it assesses the reliability of non-experimental estimates by comparing them to experimental estimates. We find that our method for using experimental variation to estimate the relationship between neighborhood poverty and individual outcomes – instrumenting for neighborhood poverty with site-by-treatment group interactions – produces precise estimates in models in which poverty enters linearly. Our estimates of nonlinear and threshold models are not precise enough to be conclusive, though many of our point estimates suggest little, if any, deviation from linearity. Our non-experimental estimates are inconsistent with our experimental estimates, suggesting that non-experimental estimates are not reliable. Moreover, the selection pattern that reconciles the experimental and non-experimental results is complex, suggesting that common assumptions about the direction of bias in non-experimental estimates may be incorrect.

Date: 2004-08
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Working Paper: Beyond Treatment Effects: Estimating the Relationship Between Neighborhood Poverty and Individual Outcomes in the MTO Experiment (2004)
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Persistent link: http://EconPapers.repec.org/RePEc:ecl:harjfk:rwp04-036

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