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1 Introduction Animportantthemeinindustrialorganizationisthatamonopolistfirmwilluseitsincumbencypositioninordertoinfluencetheentrydecisionsofpotentialcompetitors.Asmallbutgrowingliteratureonthestrategicuseoflicensing[1~ 4 ] hasfocusedontheroleoflicensingi......