TY - BOOK AU - Helpman,Elhanan AU - Krugman,Paul R. TI - Trade policy and market structure SN - 0262081822 AV - HF1379 .H45 1989 PY - 1989/// CY - Cambridge, Mass. PB - MIT Press KW - International trade KW - Commercial policy KW - SOM1 N1 - Includes bibliographies and index ER -