Christopher M. Weible is Associate Professor of Public Affairs at the University of Colorado Denver, USA. Tanya Heikkila is Associate Professor of Public Affairs at the University of Colorado Denver, USA. Karin Ingold is Professor of Political Science at the Institute of Political Science, University of Bern, Switzerland. Manuel Fischer is Researcher in the Environmental Social Sciences department at Eawag, Dübendorf, Switzerland and Lecturer at the Institute of Political Science, University of Bern, Switzerland.