Research studies show that those who voted for the candidates who have lost the first round often make ill-concieved decisions on the day of the second round. Those unexpected victories in run-off elections (of candidates who had far less votes than the winner of the first round) show that the flow of votes in the second round is often irrational. The supporters of the first round winner often abstain in the second round or choose a different candidate. Therefore, the second round gives an artificial result imposed by the absolute majority system.