1. Center of Public and Nonprofit Management—Corporate Governance and Ethics, University of Freiburg , 1 Wilhelmstraße 1b, Freiburg, Freiburg im Breisgau, Baden-Württemberg 79085, Germany
2. Department of Microsystems Engineering (IMTEK), University of Freiburg , 3 Georges-Köhler-Allee 103, Freiburg im Breisgau, Baden-Württemberg 79110, Germany