Theodorus S.H. Driessen University of Twente at Enschede, The Netherlands   Department of Applied Mathematics University of Twente P.O. Box 217 Enschede, 7500 AE The Netherlands   t.s.h.driessen@ewi.utwente.nl   http://dmmp.ewi.utwente.nl/people/staff/driessen       Primary Research Focus: Cooperative Game Theory   JEL Areas: C7 : Game Theory and Bargaining Theory:General C6 : Mathematical Methods and Programming: General