Sverker Gustavsson is Jean Monnet Professor of European political integration at the Department of Government, Uppsala University, Sweden. His main research interests are European constitutional affairs, welfare state theory and research policy doctrines. Christer Karlsson is Associate Professor in the Department of Government, Uppsala University. His main research interests are democratic theory, European Union politics and international climate change negotiations. Thomas Persson is Researcher in the Department of Government, Uppsala University. His research interests include the involvement of civil society and interest groups in European Union politics, and the impact of European integration on national political systems.