He was born Oct. 16, 1949, in Oberlin, Ohio, a son of Narise Puder Clogg of Belleville, Ohio, and the late Richard Clogg. On September 24, 1977,he married Judy Ellenberger, who survives.
A graduate of Clearfork High School, Clearfork, Ohio, he earned a bachelor's degree in sociology, summa cum laude, from Ohio University in 1971. In 1974, he earner a master of arts degree in sociology and a master of science degree in statistics, and a Ph.D. in sociology in 1977, all from the University of Chicago. He was inducted into the Phi Beta Kappa National Honor Society. He joined the faculty at Penn State in 1976.
A distinguished professor of sociology and statistics at Penn State, he was a nationally renowned expert in quantitative methods and demography, particularly for his work on the analysis of rates, standardization methods and latent structure analysis. He made important contributions to the statistical analysis of categorical data.
During the past five years, he was one of the foremost experts on National Academy of Science panels and professional association committees of population statistics in the United States.
Clogg was an active member of the American Sociology Association, American Statistical Association and the Population Association of America, serving on committees and in leadership positions. He was a member of the Biometric Society, the International Union for the Scientific Study of Population, the International Sociological Association, Psychometric Society, the Institute of Mathematical Statistics and the Royal Statistical Association.
Among his many honors, he was a Fellow of the American Statistical Association in 1987, the Royal Statistical Society in 1990 and the American Association for the Advancement of Science in 1993. He also served in editorial capacities for many professional journals.
He was a member of the State College Christian and Missionary Alliance Church. In addition to his mother and wife, he is survived by four daughters, Katye, Edna, Roberta and Edith Clogg, all of Bellefonte; two sisters, Corinne Biere of Butler, Ohio, and Susan Remcheck of Gastonia, N.C.; and a brother, David Clogg of Utica, Ohio.
Memorial contributions may be made to the PAA Clifford C. Clogg Memorial Fund for the establishment of an award within the PAA, described on page 5.
There will be a Memorial gathering at the annual meetings of the American Sociological Association in Washington, DC to honor the memory of Dr. Clogg. The memorial will be on August 20 at 10:15 p.m. in one of the ballrooms of the Washington Hilton. The room location will be listed in the final ASA program.
In September 1985 she took a position in the Marriage and Divorce Statistics Branch, Division of Vital Statistics, National Center for Health Statistics. In August of 1987, she moved to the Family Growth Statistics Branch, also in the Division of Vital Statistics, and worked there until her death. She was the author of many statistical reports, and was well-known among family demographers for her research on adoption and the children of divorced parents. She was active in the Population Association of America, where she was co-editor of the association's newsletter beginning in 1993.
A scholarship fund at the University of Michigan has been established in Kathy's memory. Donations (payable to the University of Michigan) may be sent to The University of Michigan Development Office, 350 S. Thayer Street St., Ann Arbor, MI 48104-1608. Please be sure to note on your check that it is 'in memory of Kathy London.'