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Three major polling houses published their polls this week: MDA, Ibope, and Vox Populi. The following numbers incorporate these data. With current data, a runoff between Dilma and Marina seems to be inevitable (.87), though its certainty has decreased from the previous week as the following chart indicates.
How to understand the following plots: The big dot at the end is my best guess where, I think, the candidate will end. The “plus” signs represent the polling data estimates published by polling houses.
DILMA ROUSSEFF (PT) 
MARINA SILVA (PSB) 
AÉCIO NEVES (PSDB) 
OTHERS 
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