Randomly Weighted LAD-Estimation for Partially Linear Errors-in-Variables Models

Citation:

Xiaohan YANG,Rong JIANG,Weimin QIAN.Randomly Weighted LAD-Estimation for Partially Linear Errors-in-Variables Models[J].Chinese Annals of Mathematics B,2015,36(4):561~578
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Authors:

Xiaohan YANG; Rong JIANG; Weimin QIAN;
Abstract: The authors consider the partially linear model relating a response $Y$ to predictors $(x,T)$ with a mean function $x^{\rm T}\beta_0+g(T)$ when the $x's$ are measured with an additive error. The estimators of parameter $\beta_0$ are derived by using the nearest neighbor-generalized randomly weighted least absolute deviation (LAD for short) method. The resulting estimator of the unknown vector $\beta_{0}$ is shown to be consistent and asymptotically normal. In addition, the results facilitate the construction of confidence regions and the hypothesis testing for the unknown parameters. Extensive simulations are reported, showing that the proposed method works well in practical settings. The proposed methods are also applied to a data set from the study of an AIDS clinical trial group.

Keywords:

Partially linear errors-in-variables, LAD-estimation, Randomly weighted method, Linear hypothesis, Randomly weighted LAD-test

Classification:

62E17, 62F10
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