Jorgen Goul Andersen is Professor of Political Sociology at the Centre for Comparative Welfare State Studies, Aalborg University, Denmark. He is the author of numerous books and articles on the economic and political challenges of current welfare states, and on political behaviour, political participation and democracy. Per H. Jensen is a sociologist and currently Associate Professor in Comparative Welfare State Studies at Aalborg University. Since 1981, he has conducted several research projects on labour markets and welfare states in a comparative perspective. He is chair of COST A13 'Changing labour markets, welfare policies, and citizenship'.