of Public Affairs at the University of Maryland, and a visiting lecturer at the Department of Statistics, Princeton University. His general area of research is the use of statistics in public policy, with particular interest in census undercount, model validation, and robust estimation. He received a B.S. degree in mathematics from the University of Michigan and M.S. and Ph.D. degrees in statistics from Stanford University.

Daniel L.Cork is a program officer for the Committee on National Statistics, currently assisting the Panel to Review the 2000 Census and serving as co-study director of the Panel on Research on Future Census Methods. His research interests include quantitative criminology (particularly space-time dynamics in homicide), Bayesian statistics, and statistics in sports. He holds a B.S. degree in statistics from George Washington University and an M.S. in statistics and a joint Ph.D. in statistics and public policy from Carnegie Mellon University.

William F. Eddy is professor of statistics at Carnegie Mellon University. His research concentrates on the computational and graphical aspects of statistics. He is particularly interested in dynamic graphics for the analysis and presentation of data, especially those dynamic graphical displays that cannot be rendered interactively. He is a former member of the Committee on National Statistics; a fellow of the American Association for the Advancement of Science, the American Statistical Association, the Institute of Mathematical Statistics, and the Royal Statistical Society; and an elected member of the International Statistical Institute. He was the founding coeditor of CHANCE magazine and is the founding editor of the Journal of Computational and Graphical Statistics. He has an A.B. degree from Princeton University, and M.A., M.Phil., and Ph.D. degrees from Yale University.

Robert M.Hauser is Vilas research professor of sociology at the University of Wisconsin-Madison, where he has directed the Center for Demography and Ecology and the Institute for Research on Poverty. He currently directs the Center for Demography of Health and Aging. He is a member of the National Academy of Sciences and a fellow of the National Academy of Education, the American Association for the Advancement of Science, the American Statistical Association, the Center for Advanced Study in the Behavioral Sciences, and the American Academy of Arts and Sciences. He has served on the National Research Council’s Committee on National Statistics, Commission on Behavioral and Social Sciences and Education, and Board on Testing and Assessment. His current research interests include trends in educational progression and social mobility in the United States among racial and ethnic groups, the uses of educational assessment as a policy tool, the effects of families on social and economic inequality, and changes in socioeconomic standing, health, and well-being across the life course. He received a B.A. degree from the University of Chicago and a Ph.D. degree from the University of Michigan.