I am an emeritus professor of sociology at Texas A&M University. I have been a sociology and demography professor for almost 50 years. I served on the faculties of the University of Texas at Austin, Cornell University, and, since 1992, Texas A&M University. I am a demographer and conduct research in several areas, including the demography of race and ethnicity, international migration, the demography of sexual minorities, and the demography of China, Taiwan and Korea. In much of my research I pay special attention to the political and social implications of the results and their trends. At Texas A&M, I taught undergraduate classes in demography and graduate classes in statistics, demographic methods, and demography.
I served as President in 2004-2005 of the Southwestern Social Science Association, as President in 1995-97 of the North American Chinese Sociologists Association, as president in 1975-77 of the Southern Demographic Association. I have been elected to membership in Alpha Kappa Delta (1964), and the Sociological Research Association (1984). In November 2014, I was elected to Fellow of the American Association for the Advancement of Science (AAAS).