Marco Tortoriello is Associate Dean of the Master Division, Director of the Doctorate in Business Administration (DBA) at SDA Bocconi School of Management and Professor at the Department of Management and Technology (Bocconi University). Previously he has been Assistant Professor at the Department of Strategy of the Écoles des Hautes Études Commerciales (until 2009), and an Associate Professor at the Instituto de Estudios Superiores de la Empresa – IESE Business School. His research focuses on understanding mechanisms and returns to informal network relationships defined within and across organizations. In particular, he studies the social context of intra‐ and inter‐organizational ties focusing on social networks, knowledge management, innovativeness, and performance. His recent research has appeared in such journals as the Academy of Management Journal, the Annals of the Academy of Management, Strategic Management Journal, Organization Science, Organization Studies, and European Management Journal among others. He is a member of the editorial board of Academy of Management Journal, Organization Science and Academy of Management Review and has developed studies on informal networking and knowledge management for companies such as STMicroelectronics and Henkel.