1. Department of Industrial Economics, Blekinge Institute of Technology (BTH), Swedish Entrepreneurship Forum, Research Institute of Industrial Economics (IFN), Stockholm, Sweden.
2. Department of Land Economy, University of Cambridge, Cambridge, UK; and Centre for Entrepreneurship and Spatial Economics, Jönköping, Sweden.
3. Department of Land Economy, University of Cambridge, Cambridge, UK; Research Institute of Industrial Economics, Stockholm, Sweden; and Centre for Entrepreneurship and Spatial Economics, Jönköping, Sweden.