Socio-economic Institute University of Zurich PeterZwei is professor of theoretical and practical social economics at the University of Zurich. After a research stay at the University of Wisconsin in Madison (USA) in 1974/75, he completed his habilitation in 1982 with the work “An economic model of doctor behavior”. After a year as a visiting professor at the University of the Bundeswehr in Munich and declining an appointment at the University of Munich, he was appointed to the University of Zurich in 1984, where he was elected full professor in 1990.