Title(题名):  Efficient Augmented Inverse Probability Weighted Estimation in Missing Data Problems
Authors(作者):  Jing Qin, Biao Zhang, and Denis H. Y Leung
Source title(刊名):  Journal of Business &Economic Statistics:A Publication of the American Statistical Association
Volume, Issue, Issue date
Pages(页码):  p86-97
ISSN:  0735-0015
Abstract(摘要):  When analyzing data with missing data, a commonly used method is the inverse probability weighting (1PW) method, which reweights estimating equations with propensity scores. The popularity of出e IPW method is due to its simplicity. However, it is often being criticized for being inefficient because most of the information from the incomplete observations is not used. Alternatively, the regression method is known to be efficient but is nonrobust to the misspecification of the regression function. In this article, we propose a novel way of optimally combining the propensity score function and the regression model. The resulting estimating equation enjoys the properties of robustness against misspecification of either the propensity score or the regression function, as well as being locally semiparametric efficient. We demonstrate analytically situations where our method leads to a more efficient estimator than some of its competitors. In a simulation study, we show the new method compares favorably with its competitors in finite samples. Supplementary materials for this article are available online.
Key words(关键词):  Inverse probability weighting; Missing data; Regression estimate; Semiparametric efficiency.
Where(馆藏地):  304外文报刊阅览室
Available online
 2018/1/9 8:14:36
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