[1] Hebrew Univ Jerusalem, Jerusalem, Israel
[2] Emory Univ, Goizueta Business Sch, Atlanta, GA 30322 USA
[3] George Washington Univ, Sch Business, Washington, DC 20052 USA
[4] George Mason Univ, Sch Management, MSN 5F5,4400 Univ Dr, Fairfax, VA 22030 USA