[1] Univ Bundeswehr Munchen, Coll Business, Neubiberg, Germany
[2] Otto Friedrich Univ Bamberg, Bamberg, Germany
[3] Univ Hohenheim, Dept Mkt & Management, Stuttgart, Germany
[4] Univ Michigan Dearborn, Dearborn, MI USA
[5] Reutlingen Univ, Herman Hollerith Res Ctr, Boblingen, Germany