2-625: The Cooperative Election Study (abbreviated CES ) (formerly the Cooperative Congressional Election Study, abbreviated CCES) is a national online survey conducted before and after United States presidential and midterm elections. Originally designed by Stephen Ansolabehere of Harvard University , it was originally fielded in 2006 by the Palo Alto , California -based company Polimetrix, Inc., with help from 39 different American universities. Its original goal
4-448: Was to survey voters in the 2006 midterm elections . When it was begun, it was the largest survey of Congressional elections ever, with over 36,500 participants in its first wave alone. The pre-election phase of the CES involves administering the first two-thirds of the questionnaire from late September to late October. The post-election phase involves administering the remaining one-third of
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