00351    a2200109   4500001001000000005001700010008004100027245006400068100002000132773007200152999001700224ART_1182220260410161900.0260409a                                 10aProduct deferentiation and performance in insurance markets1 aSpence, Michael0 tJournal of public economicsg- Vol. 10, Nº 3 (dic. 1978)wREV11485  c25868d25868