In 1900 Ludwig von Mises began to study law at the University of Vienna and was graduated 'Dr.iur.' in 1906. Subsequently, he began to work at the Vienna Chamber of Commerce and Industry, where he headed the finance department. In 1913 he was promoted lecturer ('Privatdozent') at the University of Vienna, in 1918 he became extraordinary Professor. His private seminars were attended by numerous prominent scientists, including Friedrich Engel Jánosi, Gottfried Haberler, Oskar Morgenstern, Martha Stephanie Braun and Friedrich von Hayek (later Nobel prize winner).
Ludwig von Mises was a leading economic adviser to the Austrian Government, e.g. at the end hyperinflation in 1922 and the reorganization of the Austrian National Bank. and advocated a liberal economic policy.
Ludwig von Mises taught at the Institut universitaire de hautes études internationales in Geneva/Switzerland since 1934. He was persecuted in times of Nazism as a Jew, lost his position and was thrown out of the university on April 8th, 1938. Ludwig von Mises initially remained in Switzerland. In 1940 he emigrated to the USA, received the US Citizenship in 1946 and taught at New York University from 1945 to 1969.