Research Interests:

The jackknife, bootstrap and other resampling methods
Variable selection and inference with high dimensional data
Sample surveys (variance estimation, imputation for nonrespondents)
Missing data (nonignorable missing, dropout, semi-parametric methods)
Longitudinal data analysis with missing data and/or measurement error
Medical statistics (clinical trials, personalized medicine, covariate-adaptive design)

Education:

B.S. in Mathematics, 1978--1982, East China Normal University
Ph.D. in Statistics, 1983--1987, University of Wisconsin-Madison

Work Experience:

Professor: 1996-present, Statistics, University of Wisconsin
Chair: 2005-2009, Statistics Department, University of Wisconsin
Associate Chair: 1997-2004, Statistics Department, University of Wisconsin
Statistician: 2008-present, US Census Bureau
Senior Research Fellow: 1996-1997, 2006-2007 NSF/ASA/BLS/Census Bureau
Senior Research Fellow: 1998, Covance
Associate Professor: 1994-1996, Statistics, University of Wisconsin
Associate Professor: 1991-1993, Mathematics, University of Ottawa
Assistant Professor: 1989-1991, Mathematics, University of Ottawa
Assistant Professor: 1987-1989, Statistics, Purdue University

Professional Activities:

Editor: Statistical Theory and Related Fields (Jan. 2017--present)
Editor: Journal of Nonparametric Statistics (Jan. 2016--Dec. 2018)
Co-Editor: Journal of System Science and Complexity (June 2014--Sept. 2019)
Management Board Member: Statistics and Its Interfaces (Dec. 2007--present)
Associate Editor: Statistica Sinica (June, 1991--Dec. 2008)
Associate Editor: Journal of American Statistical Association (March 1993--Dec. 1996)
Associate Editor: Journal of American Statistical Association (Jan. 1999--Dec. 2005)
Co-Editor: Journal of Multivariate Analysis (Jan. 2002--Dec. 2005)
Co-Editor: Sankhya (Jan. 2002--Dec. 2007)
Fellow: Institute of Mathematical Statistics
Fellow: American Statistical Association
Member: International Chinese Statistical Association
Board of Directors: International Chinese Statistical Association (Aug. 1999--Aug. 2002)
President: International Chinese Statistical Association (2007)

• Assignments for Stat 709
• Assignments for Stat 710
• Lecture Material for STAT 609
• Lecture Slides for STAT 709
• Lecture Slides for STAT 710
• Text Book: Mathematical Statistics
• Lecture Materials for STAT 992 (Variable Selection)
• University of Wisconsin Statistics Department