Came to the United States, 1950, naturalized, 1955. Research associate University of Chicago, 1955-1957, member of faculty, 1957-1982, professor economics, 1965-1982, master social sciences collegiate division, associate dean of college of university. Visiting professor England School of Economics, 1963.
Fulbright professor Hebrew U., 1967-1968. Cons. Research and Development Corporation, 1959, National Bureau Economics Research, 1963-1966.