The political economy of U.S. tariffs : an empirical analysis / Réal P. Lavergne. Political economy of US tariffs. Lavergne, Real P. Tariff United States Mathematical models. 382.70973 LAP Includes bibliographical references and index. New York : Academic Press, 1983. 1983. 1983 Text ix, 210 p. ; eng Economic theory, econometrics, mathematical economics United States