讲座预告: 李道纪:Nonparametric Screening for Additive Quantile Regression in Ultra-high Dimension
通讯员:  发布人:沈彤  发布时间:2024-05-24   浏览次数:12

报告题目: Nonparametric Screening for Additive Quantile Regression in Ultra-high Dimension

报告人  李道纪

报告时间:2024年52916:00-1700

报告地点:文波楼202智慧教室

摘要(Abstract: In practical applications, one often does not know the true structure of the underlying conditional quantile function, especially in the ultra-high dimensional setting. To deal with ultra-high dimensionality, quantile-adaptive marginal nonparametric screening methods have been recently developed. However, these approaches may miss important covariates that are marginally independent of the response, or may select unimportant covariates due to their high correlations with important covariates. To mitigate such shortcomings, we develop a conditional nonparametric quantile screening procedure (complemented by subsequent selection) for nonparametric additive quantile regression models. Under some mild conditions, we show that the proposed screening method can identify all relevant covariates in a small number of steps with probability approaching one. The subsequent narrowed best subset (via a modified Bayesian information criterion) also contains all the relevant covariates with overwhelming probability. The advantages of our proposed procedure are demonstrated through simulation studies and a real data example. 


报告人简介: 李道纪博士现为美国加州州立大学 Fullerton 校区(CSUF)商业与经济学院数据科学与统计学系副教授。早年于英国曼彻斯特大学获得统计学博士学位,在美国南加州大学数据科学与运筹系从事博士后研究,并曾任教于中佛罗里达大学统计与数据科学系。研究兴趣包括:高维统计,特征筛选深度学习,因果推断,纵向数据分析等;研究成果主要发表在统计学国际知名期刊The Annals of Statistics, Journal of Business & Economic Statistics, Journal of Business ResearchJournal of Multivariate Analysis, Computational Statistics & Data Analysis等。