Amiti, Mary Are uniform tariffs optimal? / Mary Amiti - Washington, D.C. : International Monetary Fund (IMF) , 2004 - 18p. : ill. ; 26 cm. - IMF Working Paper No. 04-72 . Includes bibliographical references Subjects--Topical Terms: Trade liberalizationTariffs Gov. Doc. Class. No.: UN IMF WP-04-72