This paper analyzes the factors that provoked the electoral victory of the Spanish Socialist Workers Party (Partido Socialista Obrero Espanol, PSOE) in Catalonia, an autonomous community that has been key to the triumph of this party in the general elections of 9 March, 2009. The study is centered on electoral abstention, the transfer of votes among parties, the electoral decline of the other political forces represented in Catalonia and the increase of votes experienced by the Socialist Party, based on the analysis of election results from the different general elections of Deputies to Congress facilitated by the web page of the Spanish Ministry of the Interior. Therefore, conclusions could be made as to whether some determining factor existed to explain the socialist victory or if the victory was due to several factors, as the authors sustain in their party hypothesis.
