Hal Varian: The Economics of Internet search
Savé http://www.youtube.com/watch?v=CT2k4z0xPwE&feature=player_detailpage
http://timeadn.com/?narychniki=rencontrer-homme-en-notre-dame-de-gravenchon&e2c=97 Apropiación Incluyente Google Precios diferenciales Subastas Varian