Increasing returns and network structure in the evolutionary dynamics of industries Andrea Bonaccorsi * and Paola Giuri * * Sant’Anna School of Advanced Studies, Pisa, Italy 1999/12 October 2000 L L E E M M Laboratory of Economics and Management Sant’Anna School of Advanced Studies Via Carducci, 40 - I-56127 PISA (Italy) Tel. +39-050-883-341 Fax +39-050-883-344 Email: lem@sssup.it Web Page: http://lem.sssup.it Working Paper Series