Pierre Dehez CORE, University of Louvain   CORE Voie du Roman Pays 34 Louvain-la-Neuve, 1348 Belgium   pierre.dehez@uclouvain.be         Primary Research Focus: cooperative games, cost sharing, general equilibrium   JEL Areas: C7 : Game Theory and Bargaining Theory:General D5 : General Equilibrium and Disequilibrium: General