00786nam0 22002411i 450 990003168040403321000316804FED01000316804(Aleph)000316804FED0100031680420000920d--------km-y0itay50------baitaITProduct Innovation Under Vertical Differentiation and the Persistence of MonopolyLuca LambertiniCollana del Dipartimento di scienze economiche, Università di Bologna227Lambertini,Luca<1964- >ITUNINARICAUNIMARCBK990003168040403321SESProduct Innovation Under Vertical Differentiation and the Persistence of Monopoly457634UNINAING01