ARNI SVERRISSON is Associate Professor at the Department of Sociology, University of Stockholm. He is author of Evolutionary Technical Change and Flexible Mechanization: Entrepreneurship and Industrialization in Kenya and Zimbabwe, and edited Social Movements in Development: The Challenge of Globalization and Democratization (with Staffan Lindberg). In addition, he has published a large number of reports and articles on technological change in small enterprise networks, sustainable technology, digital image technologies and social network theory, which remain his main research interests. - MEINE PIETER VAN DIJK is Associate Professor at the Economic Faculty of the Erasmus University in Rotterdam and the Institute for Housing and Urban Studies in Rotterdam. He is author of Burkina-Faso: le secteur informel de Ouagadougou. He edited Enterprise Clusters and Networks in Developing Countries (with R.Rabellotti) and Multilateralism versus Regionalism: Trade Issues after the Uruguay Round (with Sandro Sideri). He has in addition published a large number of books, articles and reports on development issues. His current research interests include enterprise clusters in developing countries, the problems of women entrepreneurs and the development of urban infrastructure.