[1] Univ Amsterdam, Finance Grp, Fac Econ & Econometr, NL-1018 WB Amsterdam, Netherlands
[2] Yale Univ, Sch Management, Int Ctr Finance, New Haven, CT 06520 USA
[3] INSEAD, Dept Finance, F-77305 Fontainebleau, France
[4] Cornell Univ, Johnson Grad Sch Management, Ithaca, NY 14853 USA