I was born in Russia in 1901, of Jewish parents, and came to the United States in 1922 to join my father who left Russia for the United States before World War I. My university studies began in Russia, and were completed at Columbia University (B.Sc. in 1923, M.A. in 1924, Ph.D. in 1926). It was at the graduate school at Columbia University that I first met Wesley C. Mitchell with whom I was associated for many years at the National Bureau of Economic Research, and to whom I owe a great intellectual debt.
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