Tamás Rudas is Professor of Statistics and Head of the Department of Statistics of the Faculty of Social Sciences, Eötvös Loránd University (ELTE) in Budapest and Director of the Program in Survey Statistics. Currently, he also serves as Dean of the Faculty. He is also Academic Director of the TARKI Social Research Institute. He has held several visiting appointments in the United States, Germany, Austria, Slovenia, and Poland. He is General Secretary of the European Association of Methodology. His main research area is statistics and its applications in the social sciences, especially the analysis of categorical data. Among other topics, he has contributed to the development of methods of measuring model fit and to the theory of marginal models. He has published in many theoretical and methodological journals, including The Annals of Statistics, Journal of the Royal Statistical Society, Sociological Methodology, Communications in Statistics, Journal of Educational and Behavioral Statistics, and Quality and Quantity. He is also the author of Odds Ratios in the Analysis of Contingency Tables (Sage, 1998) and Probability Theory: A Primer (Sage, 2004) and of books in Hungarian, including one (now in its second edition) on opinion polls. Professor Rudas holds a PhD in mathematics (probability theory and mathematical statistics) from the Eötvös Loránd University and a Doctor of Science degree from the Hungarian Academy of Science.