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    Flashpoints in Polling

    Many people wonder: Can polls be trusted? The following essay contains a big-picture review of the state of polling, organized around a number of key areas.

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    5. Variation in online nonprobability survey design

    One possible explanation for the variability in estimates across the different nonprobability samples is the range of methods that online sample vendors employ. They differ on recruitment, weighting and everything in between. Even if the impact of each of these differences is small, the cumulative effect could be much larger. Panel recruitment and survey sampling […]

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