Which polls have been most accurate over last 10 years?
Of pollsters that have been active in Colorado this year, SurveyUSA, which polls for the DenverPost/ 9News survey, ranks the highest, third, of 261 polling companies, Dave Kopel reports over at http://www.WhoSaidYouSaid.com. Ciruli, which is known as the pollster for Colorado Democrats, ranks an impressive 4th in terms of accuracy. Another firm that works mostly for Democrats and left-wing blogs, Public Policy Polling, ranks 18th. Rasmussen Reports claims to be independent but is accused of favoring Republicans, ranks 20th. CNN/Opinion research is 39th, Magellan is 69th, Marist Institute is 24th and Fox/Opinion Dynamics is 141st. LINKS: Kopel: Which pollsters are most accurate? By David Kopel. Pollster Ratings v4.0: Methodology, by Nate Silver. Pollster Ratings, by Nate Silver.
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