Julio M. Singer is a Professor at the Department of Statistics, University of S#227;o Paulo, Brazil, and is the co-director of the university's Center for Applied Statistics. Professor Singer is the co-author of books on categorical data and large sample theory and has publications in both methodological and applications-oriented journals. He was the 1993 James E. Grizzle Distinguished Alumnus in Biostatistics from the University of North Carolina at Chapel Hill. He supervised several graduate students and contributed to the development of the doctoral program in statistics at the University of S#227;o Paulo, Brazil.
Antonio C. Pedroso-de-Lima is an Associate Professor at the Department of Statistics, University of Sao Paulo, Brazil, and is the co-director of the university's Center for Applied Statistics. He received his doctoral degree in biostatistics from the University of North Carolina at Chapel Hill. He is the co-author of a book on introductory statistics, and his research has been published in theoretical, methodological, and applications-oriented journals. Professor Pedroso-de-Lima has advised a number of master's degree and doctoral students in the graduate program in statistics at the University of Sao Paulo.