00514pamaa2200157 4500 0000017414 20091015090000.0 087584863X HC79.I55 SHA 1999 SHAPIRO Information rules : a strategic guide to the network economy Carl Shapiro and Hal R. Varian. Boston: Harvard Business School Press, 1999. ix, 352p.: 24cm. Information technology -- Economic aspects Information society Varian, Hal R.