Nate Silver: Rasmussen polls statistically ‘biased;’ SurveyUSA polls more accurate

During the 2010 election cycle, Rasmussen Reports issued about 100 polls on races in Colorado and around the country, but polling guru Nate Silver says the Rasmussen Reports were biased toward Republicans and suffered from cost cutting short cuts that produced misleading results. The cost cutting will cost Rasmussen clients as well as credibility. No pollsters are perfect. "Other polling firms, like SurveyUSA and Quinnipiac University, produced more reliable results in Senate and gubernatorial races. A firm that conducts surveys by Internet, YouGov, also performed relatively well," Silver writes. I have to admit that I've been in denial about the Rasmussen bias. LINK: Rasmussen polls were biased and inaccurate; Quinnipiac, SurveyUSA performed strongly, by Nate Silver. UPDATE: Silver defines 'bias' as statistical bias as revealed in poll results compared with other pollsters, not necessarily political bias. When 'house effects' become 'bias', by Nate Silver.

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