Came to the United States, 1930. Professor University of Moscow, 1903-1928. Professor Institute of Economics, Moscow, 1908-1928 dean, 1909-1916.
Professor Tauric University, 1918-1920. Lecturer London School of Economies, 1928, University of Chicago, 1929. Professor University, of Graz, Austria, 1929-1930.
Professor public finance, Northwestern University, 1930-1943, emeritus. Professor Mary Washington College, Virginia 1943-1948. Member board directors Imperial Bank of Russia and various governmental coms. during Tsarist regime.
President finance section Institute of Economics Research and consultant in Commissariat of Finance, Soviet Russia, 1921-1928.
Author: Inheritance Tax (in Russian and German), 1907. Bibliography of Public Finance (in Russian), 1908. Recent Tendencies in Local Taxation (in Russian), 1909.
Die Finanzund Steuerverfassung d. The Union of Soviet Socialist Republics, 1928. The Economic Policy of Soviet Russia (German and Spanish translations), 1930.
American Tax Problems, 1935. Public Finance of The Union of Soviet Socialist Republics, 1939. Illinois Tax Reform, 1941.
War Taxation, 1941-1945. Economic Reconstruction of Europe, 1943. Soviet Finances, 1946.
Financing World World War II, 1946. Over 200 articles in various langs. Extensive tours in Europe, lecturing, 1937, 39.