Carmelo Rodriguez-Alvarez W.A. Wallis Institute of Political Economy. University of Rochester   W.A. Wallis Institute of Political Economy 109D Harkness Hall University of Rochester Rochester, NY 14627 USA   crodrig4@troi.cc.rochester.edu   http://troi.cc.rochester.edu/~crodrig4       Primary Research Focus: Social Choice, Implementation Theory, Political Economy   JEL Areas: D7 : Analysis of Collective Decision-Making: General C7 : Game Theory and Bargaining Theory:General