Christina Eder, Dr. (1980), is Head of the Research Data Center 'Elections' at GESIS. Her research focuses on electoral and non-electoral political participation, in particular direct democracy, gender politics, and the measurement and effects of political institutions.

Ingvill C. Mochmann, Dr. (1969), is Head of the EUROLAB at GESIS and Vice-President for Research and Professor of International Politics at the Cologne Business School. She has published widely in the area of democracy and minority rights.

Markus Quandt, Dr. (1968), is Head of the Research Data Center 'International Survey Programmes' at GESIS. He has published on political participation, electoral campaigning, collective goods problems, and measurement problems in comparative surveys.