Calvo, Guillermo A. Trade reforms of uncertain duration and real uncertainty : a first approximation / Guillermo A. Calvo & Enrique G. Mendoza - Washington : IMF , 1994 - 38p. : ill. ; 30 cm. - IMF Working paper No. 94/45 . Includes bibliographical references and index. Subjects--Topical Terms: Trade development Gov. Doc. Class. No.: UN IMF WP-94-45