I am currently Professor Emeritus (formerly the Maurice Falk University Professor of Statistics and Social Science) in the Department of Statistics, the Machine Learning Department, and the Heinz College. I am also the CMU co-director of the Living Analytics Research Centre. I earned my Ph.D. in statistics from Harvard University in 1968, and joined Carnegie Mellon in 1980, where I have served as the chair of the Department of Statistics and as Dean of the College of Humanities and Social Sciences.
I am 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.
My principal research interests lie in the development of statistical methodology, especially for problems involving categorical data in the form of contingency tables. My recent research has focused on approaches appropriate for disclosure limitation in multidimensional tables and their relationship with results on bounds for table entries given a set of marginals, estimating the size of populations (especially in the context of census taking), and Bayesian approaches to the analysis of categorical data. Other interests include: Bayesian approaches to confidentiality and data disclosure; causation; foundations of statistical inference; history of statistics; sample surveys and randomized experiments; statistics and the law; inference for multiple-media data.