The concern for the control of the actual campaign expenses by the different political parties has been recently increased. It is argued that the excessive expenses cause inequity among the different political forces, since they strongly infl uence the citizen's decision to vote for the partisan option that spends more during the campaigns. The use of public resources for the fi nancing of these political campaigns has also been questioned. This study analyzes the incidence of the campaign expenses in the electoral results. The relationship betweaen the campaign expenses and the vote is statistically signifi cant, both the parties in its group explaining in some way the abstentionism and each one of the individual political forces, showing in a preliminary way the effi ciency in the use of these expenses. However, in both cases the estimated coeffi cients show a weak causal relationship.