I received B.Sc. in Geography from National Taiwan University (Taiwan) in 1988, M.Sc. in Statistics from National Central University (Taiwan) in 1990, and Ph.D. in geography in 1998 from McMaster University (Canada). He is associate research fellow of Research Center for Humanities and Social Sciences (RCHSS), Academia Sinica, Taiwan. Main research specialty and interests include (1) migration, population, & labor studies, (2) statistical computing & numerical computing for mathematical optimization, (3) methods for survey research, and (4) data science/geospatial science.