Sheizaf Rafaeli (PhD Stanford University) is Director of the Center for the Study of the Information Society and Professor at the Graduate School of Management, University of Haifa, Israel. His interests include information sharing and the value of information, mediated interaction, synchronicity, simulations, online behaviour, groups and decision making. He has taught in numerous universities in Israel, Europe and the US, including the Hebrew University of Jerusalem, Stanford University and the University of Michigan. He is coauthor of Network and Netplay (MIT Press) and co-founder of the Journal of Computer-Mediated Communication.