00319    a2200109   4500001001000000005001700010008004100027245003300068100002000101773007100121999001700192ART_1171220260410161859.0260409a                                 10aNonlinear prices and welfare1 aSpence, Michael0 tJournal of public economicsg- Vol. 8, Nº 1 (ago. 1977)wREV11485  c25763d25763