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Inverse Probability of Treatment Weighting (Propensity Score) using the Military Health System Data Repository and National Death Index
Published on: January 8, 2020
Comments on 'A weighting analogue to pair matching in propensity score analysis' by L. Li and T. Greene
Shunichiro Orihara1, Taishi Kawamura1, Masataka Taguri1
1Graduate School of Data Science, Yokohama City University, Yokohama, Kanagawa, Japan.
Abstract:
Li and Greene (A weighting analogue to pair matching in propensity score analysis. Int J Biostat 2013;9:215-34) propose that estimates derived by the matching weight (MW) estimator are similar to those derived by the one-to-one propensity score matching estimator. The MW estimator has some useful properties, however, some regularity conditions need to be confirmed to derive an asymptotic distribution since the MW has a non-differentiable point. In this letter, we confirm the asymptotic distribution of the MW estimator and the sufficient conditions to achieve it.
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