1 direct substitutes and indirect complements in durable goods market the digital camera 2001 2004 junji xiao school of economics shanghai university finance liyuan wei department marketing city hong kong this draft september 2006 preliminary incomplete abstract paper examines rapid diffusion as opposed to film cameras period it investigates those factors contributing displacement by estimating demand equations for well two kinds estimation results show that windows xp adoption pc household ownership rapidly dropping prices have played significant roles penetration ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?
