Grossman, Gene M; Helpman, Elhanan Interest groups and trade policy / Gene M. Grossman ; Elhanan Helpman - Oxford Princeton University 2002 - vii, 262p. 24cm. $19.95/- ISBN: 9780691095974 (pbk) Subjects--Topical Terms: Pressure groupsCommercial policy Dewey Class. No.: 382.3 GRO