Eva Anduiza has been an associate professor at the Department of Political Science of the Autonomous University of Barcelona since 2003, where she is also principal investigator of the research group on Democracy, Elections and Citizenship. She holds a degree in political science and sociology from the Universidad Complutense de Madrid, a postgraduate diploma on social science data analysis from the University of Essex and a PhD in political and social sciences from the European University Institute in Florence. She has published in several journals including the European Journal of Political Research; the International Journal of Regional and Urban Research; Information, Communication and Society and the Journal of Information Technologies and Politics. She has also contributed to several books on political participation. Michael J. Jensen is a postdoctoral fellow at the Institute of Government and Public Policy at the Autonomous University of Barcelona. He holds a BA in political science with departmental honors from the University of Iowa and an MA and PhD in political science from the University of California, Irvine. He has been visiting fellow at the New Political Communication Unit Royal Holloway College of London, lecturer and postdoctoral research fellow at the University of California, Irvine, School of Social Sciences and visiting professor at the Open University of Catalonia. He has worked on the People, Organizations and Information Technology Project (POINT) at the Center for Research on Information Technology and Organizations (CRITO); the Internet and Political Participation project in Spain at the Autonomous University of Barcelona and the Elections and Digital Media Project at the London School of Economics. He has published in Information, Communication and Society and The Information Society. Laia Jorba has been an adjunct professor at the Department of Political Science of the Autonomous University of Barcelona since 2004, where she is a member of the research group Democracy, Elections and Citizenship. She holds a degree in political science, an MA in social science research and a PhD in political science from the Autonomous University of Barcelona. She has been a visiting researcher at the New School of Social Research in New York and a postdoctoral researcher with the project Internet and Political Participation in Spain at the Autonomous University of Barcelona and with the Social Capital and Political Integration of Migrants project in Spain at the University of Murcia. She has published in Migrations, Société, Revista Migrações, Revista Internacional de Sociologia, Revista Española de Ciencia Política and Gestión y Análisis de Políticas Públicas.