1. Department of Business Science and Management, Albstadt-Sigmaringen University of Applied Sciences , Sigmaringen, Germany
2. Wholesale & Retail Leadership Chair, Cape Peninsula University of Technology , Cape Town, South Africa
3. Faculty of Business, Baden-Württemberg Cooperative State University , Ravensburg, Germany
4. Customer Research 42 , Ravensburg, Germany
5. Department of Retail Business Management, Cape Peninsula University of Technology , Cape Town, South Africa