TY - JOUR ID - publications1515 UR - http://tse-fr.eu/pub/905 A1 - Crampes, Claude A1 - Hollander, Abraham Y1 - 1995/// PB - Elsevier JF - European Economic Review VL - 39 TI - Duopoly and Quality Standards SP - 71 AV - none EP - 82 ER -