[1] HSB Hsch Bremen City Univ Appl Sci, Bremen, Germany
[2] Univ Luxembourg, Luxembourg, Luxembourg
[3] Concordia Univ, Montreal, PQ, Canada
[4] Univ Bremen, Bremen, Germany
[5] Montpellier Business Sch, 2300 Ave Moulins, F-34185 Montpellier 4, France
[6] Poznan Univ Econ & Business, Inst Finance, Dept Investment & Financial Markets, Al Niepodleglosci 10, PL-61875 Poznan, Poland
[7] Univ Cape Town, Fac Commerce, Dept Finance & Tax, Rondebosch, South Africa