sentences:  He started his academic career as Assistant Professor at the George Washington University, and moved to the University of New Hampshire in 1968, where he became Associate Professor in 1973.From 1976 to 1983 he was senior researcher at the Scandinavian Institutes for Administrative Research.In this period he also was Professor at the Stockholm University in Sweden from 1978 to 1980, Professor at the University of Oslo in Norway from 1979 to 1982.