Assistant Professor at Universität Frankfurt 1964-66, Ordinarius (Full Professor) at Technische Universität Berlin 1966 to 1971. Since 1971 Ordinarius for Economics, especially for Economic Policy and for Monetary and International Economics, and Institute Director at Universität Basel, Switzerland. Dean of the Faculty of Philosophy and History 1982-83. Guest professor at MIT 1969, Virginia Polytechnic Institute 1974 and 1978, Stanford University 1981, University of California LA 1986/87, Australian National University, Canberra, 1993, University of California Irvine 1998, Universita degli Studi di Roma "La Sapienza" 2000, Research Fellow of the Center for Study of Public Choice, George Mason University, Fairfax, Virginia.
Corresponding Member of the Bavarian Academy of Sciences. Dr. rer. pol. h. c. of Universitaet Konstanz 2000, Universitaet Freiburg 2011, Germany. Fellow of Wissenschaftskolleg Berlin (Cent