Pranab K. Sen is the Cary C. Boshamer Professor of Biostatistics and Professor of Statistics and Operations Research at the University of North Carolina, Chapel Hill. He is the author or co-author of numerous textbooks in statistics and biostatistics, and editor or co-editor of numerous volumes in the same field. He has more than 600 publications in leading statistics journals and has supervised 83 doctoral students. Sen is a Fellow of both the Institute of Mathematical Statistics and the American Statistical Association. In 2002 he was Senior Noether Awardee for his lifelong contributions to