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REGULARIZED PROJECTION SCORE ESTIMATION OF TREATMENT EFFECTS IN HIGH-DIMENSIONAL QUANTILE REGRESSION
Journal article   Peer reviewed

REGULARIZED PROJECTION SCORE ESTIMATION OF TREATMENT EFFECTS IN HIGH-DIMENSIONAL QUANTILE REGRESSION

Chao Cheng, Xingdong Feng, Jian Huang and Xu Liu
Statistica Sinica, Vol.32(1), pp.23-41
01/01/2022
DOI: 10.5705/ss.202019.0247

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Abstract

We propose a regularized projection score method for estimating the treatment effects in a quantile regression in the presence of high-dimensional con-founding covariates. We show that the proposed estimator of the treatment effects is consistent and asymptotically normal, with a root-n rate of convergence. We also provide an efficient algorithm for the proposed estimator. This algorithm can be implemented easily using existing software. Furthermore, we propose and validate a refitted wild bootstrapping approach for variance estimation. This enables us to construct confidence intervals for the treatment effects in high-dimensional set-tings. Simulation studies are carried out to evaluate the finite-sample performance of the proposed estimator. A GDP growth rate data set is used to demonstrate an application of the method.
Mathematics Physical Sciences Science & Technology Statistics & Probability

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