Tellis, G.J.

effect hardware network effects software market network model chatter software availability marketing hardware sales consumer availability product advertising price journal study return analysis takeoff result number research stock chair volume interval metric stock market performance performance table telli gandal data interval unit exposure time variable review television internet management network externalities exposure value information growth economic science technology impact color i-mode player level · · · cd-rom estimate trading volume koyck model brand externalitie customer demand relationship series trading response literature title industry innovation equation strategy period choice future software availability session future system provider