Navigating non-positivity in neighbourhood studies: an analysis of collective efficacy and violence
Background In multilevel studies, strong correlations of neighbourhood exposures with individual and neighbourhood confounders may generate problems with non-positivity (ie, inferences that are ‘off-support’). The authors used propensity restriction and matching to (1) assess the utility of propensi...
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Veröffentlicht in: | Journal of epidemiology and community health (1979) 2013-02, Vol.67 (2), p.159-165 |
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