Overall there are 1,215 competitors; an electoral rule allows for an excess of postulants, which draws the population away from the election.
CEM na Mídia

The São Paulo voter knows how to tell different political parties apart and remains faithful to the party of their choice.

Only after qualitative searches can it be possible to know which region is the most promising when it comes to votes acquisition.

Research shows that, using computer votes, the percentage of non-valid votes have decreased in neighborhoods of low education in SP.

According to a study on the 1996 to 2002 elections, the PT, PSDB and “Malufismo” always get a large amount of votes in certain parts of the city.