Las encuestas previas a la elección presidencial 2006: reflexiones para el debate

Polls prior to the presidential elections 2006: Reflections for the debate. This paper analyzes the national polls prior to the presidential election 2006 in Mexico, emphasizing the coincidence and divergences amongst the different series publicly spread and from these with the official election's results. Thus, two groups of national polls are detected; one of them with estimations that would end up being close o the results and another one with systematic slants that separated them from it. Based on this revision, the pertinence of checking the methodological canon of the public opinion research is proposed in our country