Diploma in agricultural, University Berlin, 1963. Doctor of Agricultural, University Berlin, 1967. Master of Science, University Illinois, Champaign-Urbana, 1969.
Doctor of Philosophy, University Illinois, Champaign-Urbana, 1972.
Consultant, Agrar-und Hydrotechnik, Essen, Germany, 1972-1974; principal economist, International Crops Research Institute for Semi-Arid Tropics, Hyderabad, India, 1974-1985; director resource management, International Crops Research Institute for Semi-Arid Tropics, Hyderabad, India, 1985-1986; professor agricultural economics, U. Hohenheim (Germany), since 1987. Visiting scientist International Institute Applied Sys. Analysis, Laxenburg, Austria, 1981-1982.
Member American Association Agricultural Economists, Rotary Club.
Married Barbara von Arnim, August 19, 1968. Children: Philipp, Michael, Karoline.