1. Allianz Endowed Chair of Finance, WHU - Otto Beisheim School of Management, Vallendar, Germany
2. UCLA Anderson School of Management, and Goethe University Frankfurt, and Wharton School at University of Pennsylvania, and UCL Computer Science CBT, Los Angeles, CA, USA
3. Finance and Accounting Group, WHU - Otto Beisheim School of Management, Vallendar, Germany