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Pew Research Center conducted a series of analyses exploring data quality in its U.S. surveys, specifically those conducted on the Center’s online survey platform, the American Trends Panel (ATP). The goal was to determine whether any stages in the survey process were introducing error, such as systematically underrepresenting certain types of Americans. Analysis of the ATP’s current recruitment practices involved obtaining the file of all residential addresses sampled for ATP recruitment in 2020. Researchers appended information to this file to determine whether those who agreed to join the ATP were different from those who were sampled but did not join. Analysis of panelist retention rates started with the 2016 post-election survey, which attempted to interview the entire panel. Researchers determined which of these panelists from 2016 were still taking surveys fours year later in 2020. Researchers tested whether certain panelists were more…

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