Penalized empirical likelihood for quantile regression with missing covariates and auxiliary information

Yu Shen, Han-Ying Liang and Guo-Liang Fan

Communications in Statistics - Theory and Methods, 2018, vol. 47, issue 8, 2001-2021

Abstract: Based on the inverse probability weight method, we, in this article, construct the empirical likelihood (EL) and penalized empirical likelihood (PEL) ratios of the parameter in the linear quantile regression model when the covariates are missing at random, in the presence and absence of auxiliary information, respectively. It is proved that the EL ratio admits a limiting Chi-square distribution. At the same time, the asymptotic normality of the maximum EL and PEL estimators of the parameter is established. Also, the variable selection of the model in the presence and absence of auxiliary information, respectively, is discussed. Simulation study and a real data analysis are done to evaluate the performance of the proposed methods.

Date: 2018
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DOI: 10.1080/03610926.2017.1335413

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