Came to the United States, 1935, naturalized, 1941. Imprisoned, exiled to Siberia for opposition Tsarist regime, 1908-1917. Commissioner North Front, Provisional Government, 1917.
Imprisoned by Soviet government, 1917. Chief editor daily Borba, Georgia, Causcasus, 1918. Member Georgian Mission, Rome and Paris, 1919-1922.
Economics writer, Berlin, 1922-1928. Director statistics General German Federation Labor, 1928-1933. With International Labor Office, Geneva, 1934-1935.
With Central Statistical Board, Washington, 1935-1936. With committee social security Social Science Research Council, 1935-1941. Principal consultant economist Social Security Board, 1941-1947.
Research director Twentieth Century Fund, 1947-1952. Research professor Johns Hopkins, 1947-1952.
Author: Die Welt in Zahlen, 7 vols., 1925-1928. Social Consequences of the Economic Depression, 1936. Labor in the United States, 1938.
Three Aspects of Labor Dynamics, 1942. Earnings and Social Security in the United States, 1943. World Population and Production, Trends and Outlook (with E. S. Woytinsky), 1953.
Employment and Wages in the United States, 1953. World Commerce and Governments (with E. S. Woytinsky), 1955, Lessons of the Recessions, 1959. India Awakening Giant, 1957.
Stormy Passage, 1962.