What our transition to online polling means for decades of phone survey trends
What does the migration to online polling mean for the country’s trove of public opinion data gathered over the past four decades?
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How does the way a poll is conducted influence the answers people give?
Measuring public opinion on evolution has never been an easy task for survey researchers.
Detailed information on Pew Research Center international survey meethodology, such as mode of interview, sampling design, margin of error, and design effect, for each country we survey, organized by survey, country and year.
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