Nonparametric regression with responses missing at random and the scale depending on auxiliary covariates

Tian Jiang

Journal of Nonparametric Statistics, 2023, vol. 35, issue 2, 302-322

Abstract: Nonparametric regression with missing at random (MAR) responses, univariate regression component of interest, and the scale function depending on both the predictor and auxiliary covariates, is considered. The asymptotic theory suggests that both heteroscedasticity and MAR mechanism affect the sharp constant of the minimax mean integrated squared error (MISE) convergence. Our sharp minimax procedure is based on the estimation of unknown nuisance scale function, design density and availability likelihood. The estimator is adaptive to the missing mechanism and unknown smoothness of the estimated regression function. Simulation studies and real examples also justify practical feasibility of the proposed method for this complex regression setting.

Date: 2023
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DOI: 10.1080/10485252.2022.2149749

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