[1] Texas A&M Univ, Mays Business Sch, Dept Management, College Stn, TX 77843 USA
[2] Michigan State Univ, Sch Ind & Labor Relat, E Lansing, MI 48824 USA
[3] Univ Florida, Warrington Coll Business, Dept Management, Gainesville, FL 32611 USA
[4] London Business Sch, London, England