1. Institute for Management Research, Radboud University, 6500 HK Nijmegen, Netherlands
2. Department of Organization Studies and Center for Innovation Research, Tilburg University, 5000 LE Tilburg, Netherlands; and Graduate School of Technology Management, University of Pretoria, Hatfield 0028, South Africa
3. Haute Equipe Partners in Public B.V., 2012 DA Haarlem, Netherlands
4. Eller College of Management, University of Arizona, Tucson, Arizona 85721