Distortions in referendum outcomes caused by quorum rules: Evidence from a pivotal-voter model Luís Aguiar-Conraria ∗ Pedro Magalhães † March 12, 2009 Abstract If you were unlucky enough to come accross this paper, please keep in mind that this is a very preliminary version. At this point, we decline any responsability on the consequences of using the implications of our analysis in the real world. If you want to cite this paper, please contact one of the authors to check if there is a newer, and more reliable, version of the paper. Keywords: Jel Codes: D72 ∗ NIPE and Economics Departament, University of Minho, E-mail address: lfaguiar@eeg.uminho.pt † Social Sciences Institute, University of Lisbon. E-mail address: pedro.magalhaes@ics.ul.pt 1