Antonio M. Osorio Mr. Universitat Rovira i Virgili   Av. de la Universitat 1 Reus, 43204 Spain   superacosta@hotmail.com   http://gandalf.fcee.urv.es/departaments/economia/professors/aosorio/           JEL Areas: C7 : Game Theory and Bargaining Theory:General D8 : Information, Knowledge, and Uncertainty: General