Treballs Finals del Màster d'Economia, Facultat d'Economia i Empresa, Universitat de Barcelona, Curs: 2014-2015, Tutor: Albert Solé Ollé i Pilar Sorribas.This paper aims to study whether government type in a PR electoral system (i.e., coalition, minority, or majority) has an effect on corruption. Using data of Spanish local governments for the 1999-2007 period (two consecutive terms-of-office), we compare nearly identical municipalities regarding their political characteristics, with the only difference that one is a coalition and the other a majority government. Our findings reveal that the effect of coalition (and neither minority) governments on corruption is not different than in majority ones