Simone Righi "Lendület" - Research Center for Educational and Network Studies (RECENS)   Országház utca 30, Budapest, 1014, HUNGARY   simone.righi@tk.mta.hu   http://perso.fundp.ac.be/~srighi/           JEL Areas: D4 : Market Structure and Pricing: General D7 : Analysis of Collective Decision-Making: General