H.A. David is Distinguished Professor Emeritus in the Department of Statistics, Iowa State University, and served as Department Head from 1972 to 1984. He was Editor of Biometrics from 1967 to 1972 and President of the Biometric Society from 1982 to 1983. His publications include the books Order Statistics (Wiley, 1970, 1981) and The Method of Paired Comparisons (Griffin, 1963, 1988). Apart from articles in these two areas, he has written on statistical inference, experimental designs, competing risks, and the history of statistics. He received a Ph.D. in statistics from University College London in 1953.
A.W.F. Edwards is Professor of Biometry at Cambridge University. He was President of the British Region of the Biometric Society from 1992 to 1994 and is Chairman of the Christiaan Huygens Committee for the History of Statistics of the International Statistical Institute. His publications include the books Likelihood (Cambridge University Press, 1972; Johns Hopkins University Press, 1992), Foundations of Mathematical Genetics (Cambridge University Press, 1977, 2000), and Pascal's Arithmetical Triangle (Griffin, 1987). He holds Ph.D. and Sc.D. degrees from Cambridge University.