1. City University of Hong Kong , 83 Tat Chee Avenue, Kowloon, Hong Kong SAR. e-mail: bspencer@cityu.edu.hk
2. Department of Management and Technology, Bocconi University , Röntgen 1, Milan 20136, Italy . e-mail: carlo.salvato@unibocconi.it
3. Management Department, Frankfurt School of Finance & Management gGmbH , Adickesallee 32-34, Frankfurt am Main D-60322, Germany . e-mail: c.rerup@fs.de