Numbers, Facts and Trends Shaping Your World

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    Methodology: Survey

    The data in this Pew Research Center report is drawn from a national cross-sectional survey conducted by Westat. The sampling design of the survey was an address-based sampling (ABS) approach, supplemented by list samples, to reach a nationally representative group of respondents. The survey was fielded July 5, 2022, through Jan. 27, 2023. Self-administered screening […]

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    2. Christian population change

    Christians remain the largest religious group. But they’re shrinking as a share of the global population, as many Christians are leaving religion altogether.

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    Appendix A: Comparing results across Religious Landscape Studies

    Many questions in the 2023-24 Religious Landscape Study (RLS) previously were asked in the 2007 and 2014 landscape studies. Measuring change over time on these questions is one key goal of the new RLS. But the 2023-24 survey was conducted using different methods from the 2007 and 2014 surveys, and this “mode switch” complicates comparisons […]

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    Appendix: Classifying European political parties

    Classifying parties as populist Although experts generally agree that populist political leaders or parties display high levels of anti-elitism, definitions of populism vary. We use three measures to classify populist parties: anti-elite ratings from the 2019 Chapel Hill Expert Survey (CHES), Norris’ Global Party Survey and The PopuList. We define a party as populist when […]

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