Abdoul Aziz Ndiaye Lares, Université Gaston Berger de Saint-Louis, Sénégal   elhadji-abdoul-aziz.ndiaye@ugb.edu.sn Saint-Louis, Sénégal   elhadji-abdoul-aziz.ndiaye@ugb.edu.sn             JEL Areas: D7 : Analysis of Collective Decision-Making: General H : Public Economics