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math.ST2019★ 6 cited
Nonparametric Screening under Conditional Strictly Convex Loss for Ultrahigh Dimensional Sparse Data
Xu Han
Sure screening technique has been considered as a powerful tool to handle the ultrahigh dimensional variable selection problems, where the dimensionality p and the sample size n ca…
stat.ME2019
Re-Evaluating Strengthened-IV Designs: Asymptotic Efficiency, Bias Formula, and the Validity and Power of Sensitivity Analyses
Siyu Heng, Bo Zhang, Xu Han +2
Instrumental variables (IVs) are extensively used to estimate treatment effects when the treatment and outcome are confounded by unmeasured confounders; however, weak IVs are often…