A model-free conditional screening approach via sufficient dimension reduction. Issue 4 (1st October 2020)

• Record Type: Journal Article
• Authors: Huo, Lei; Wen, Xuerong Meggie; Yu, Zhou
• Is Part Of: Journal of nonparametric statistics. Volume 32:Issue 4(2020)
• Page Start: 970
• Page End: 988
• Publication Date: 2020-10-01
• Subjects: Conditional screening -- trace pursuit -- variable selection -- sufficient dimension reduction; 62G05; Nonparametric statistics -- Periodicals; 519.5
• DOI: 10.1080/10485252.2020.1834554
• Languages: English
• ISSNs: 1048-5252

Abstract

ABSTRACT: Conditional variable screening arises when researchers have prior information regarding the importance of certain predictors. It is natural to consider feature screening methods conditioning on these known important predictors. Barut, E., Fan, J., and Verhasselt, A. [(2016), 'Conditional Sure Independence Screening', Journal of the American Statistical Association, 111, 1266–1277] proposed conditional sure independence screening (CSIS) to address this issue under the context of generalised linear models. While CSIS outperforms the marginal screening method when few of the factors are known to be important and/or significant correlations between some of the factors exist, unfortunately, CSIS is model based and might fail when the models are misspecified. We propose a model-free conditional screening method under the framework of sufficient dimension reduction for ultrahigh dimensional statistical problems. Numerical studies show our method easily beats CSIS for nonlinear models and performs comparable to CSIS for (generalised) linear models. Sure screening consistency property for our method is proved.