Las encuestas presidenciales en México durante el Siglo XXI

Abstract

During this century, there have been three occasions when elections were held for the election of President of the Republic in Mexico, maintaining a normal consecutive six-year periods. On all these occasions, surveys have played an important role in guiding the electorate format of the contest, but their work has not been without criticism, not only by the number of measurements publicized, but levels of inaccuracy and bias perceived at the results by poli-ticians, academics, commentators, analysts and interested public. Check the extent of these inaccuracies and relevance of existing biases is a pending task, which can be addressed, although the reasons for the errors can still pending, it is extremely difficult to achieve, beyond diagnosis, a thorough knowledge of the intervening elements that may have led to differences between estimated by surveys in a particular to a given throw the results at the polls by a group of voters who face different circumstances at a different time and that all people are never far the universe of voters entitled to vote.