Jay G. Blumler (University of Leeds) 1979

Wouter van der Brug (University of Amsterdam) 1999, 2004

Pilar del Castillo (then CIS, Madrid, now MEP) 1989, 1994, 1999

Bruno Cautres (University of Grenoble) 1999

Roland Cayrol (CEVIPOF, Paris) 1989,

Cees van der Eijk (University of Amsterdam) 1989, 1994, 1999, 2004

Mark Franklin (U. of Strathclyde, then Houston and Trinity College Hartford, now European University Institute, SPS, Florence) 1989, 1994, 1999, 2004

Dieter Fuchs (Stuttgart University) 2004

Soren Holmberg (University of Gottenburg) 1999

Richard Katz (Johns Hopkins University) 1994, 1999

Manfred Kuechler (then Florida State University, now City University of New York) 1989

Renato Mannheimer (then University of Milan) 1989, 1994, 1999

Michael Marsh (Trinity College Dublin) 1989, 1994, 1999, 2004

Pippa Norris (Harvard University) 1994

Erik Oppenhuis (University of Amsterdam) 1989, 1994

Jean-Jacques Rabier (European Commission) 1979, 1984

Karlheinz Reif (University of Mannheim) 1979

Hermann Schmitt (University of Mannheim) 1979, 1989, 1994, 1999, 2004

Holli Semetko (University of Amsterdam) 1999

Jacques Thomassen (University of Twente) 1994, 1999, 2004

Gabor Toka (Central European University, Budapest) 2004

Bernard Wessels (Free University of Berlin) 1994, 1999, 2004

Andreas Wüst (Mannheim Centre for European Social Research/MZES, University of Mannheim) 2004

Colette Ysmal (CEVIPOF, Paris) 1989, 1994, 1999