between 1959 and 1965. Following his Habilitation in 1964, he was appointed to the chair of Statistics and Econometrics at the … Department of Statistics of the University of Waterloo, Canada, in 1970/71. He has been a full professor of Econometrics and … work he has published outstanding, original articles on econometrics and statistics. To give an ex­ ample, it is his …

estimator that has become popular in applied econometrics, and conclude that its use in this context cannot be generally …