Functional quantile regression with missing data in reproducing kernel Hilbert space

Xiao-Ge Yu and Han-Ying Liang

Communications in Statistics - Theory and Methods, 2025, vol. 54, issue 11, 3418-3442

Abstract: We, in this article, focus on functional partially linear quantile regression, where the observations are missing at random, which allows the response or covariates or response and covariates simultaneously missing. Estimation of the unknown function is done based on reproducing kernel method. Under suitable assumptions, we discuss consistency with rates of the estimators, and establish asymptotic normality of the estimator for the parameter. At the same time, we study hypothesis test of the parameter, and prove asymptotic distributions of restricted estimators of the parameter and test statistic under null hypothesis and local alternative hypothesis, respectively. Also, we study variable selection of the linear part of the model. By simulation and real data, finite sample performance of the proposed methods is analyzed.

Date: 2025
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DOI: 10.1080/03610926.2024.2392857

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