Numbers, Facts and Trends Shaping Your World

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    Methodology

    Editorial note to readers (March 19, 2025): This project estimated the number of unauthorized immigrants living in 32 European countries during the mid- to late-2010s. We used what were then the best available data sources from different governments and from the European Union. After our report was published in November 2019, researchers at the University […]

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    Facebook Algorithms and Personal Data

    About half of Facebook users say they are not comfortable when they see how the platform categorizes them, and 27% maintain the site’s classifications do not accurately represent them.

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    2. RBS and RDD surveys show similar levels of accuracy when compared with population benchmarks

    To gauge the accuracy of estimates from the RDD and RBS samples on nonpolitical topics, the surveys included a number of questions that are also measured in high-quality federal surveys with high response rates.[10. numoffset=”10″ For example, the response rate for the sample adult module of the National Health Interview Survey is 54%.] This study measures […]

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    3. Improvements ahead: How humans and AI might evolve together in the next decade

    Other questions to the experts in this canvassing invited their views on the hopeful things that will occur in the next decade and for examples of specific applications that might emerge. What will human-technology co-evolution look like by 2030? Participants in this canvassing expect the rate of change to fall in a range anywhere from […]

  • short reads

    When writing about survey data, 51% might not mean a ‘majority’

    For many people, “majority” is a word so common that they rarely have to think twice about what it means. But it’s a different matter for polling organizations like Pew Research Center. At the Center, writers cannot label a survey finding a “majority” unless it meets specific criteria.

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    1. Concerns about human agency, evolution and survival

    A clear majority of the responses from these experts contained material outlining certain challenges, fears or concerns about the AI-infused future. The five most-often mentioned concerns were: 1) the use of AI reduces individuals’ control over their lives; 2) surveillance and data systems designed primarily for efficiency, profit and control are inherently dangerous; 3) displacement […]

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    Methodology

    The estimates presented in this report supersede all previously published Pew Research Center estimates. Although this report draws largely on U.S. Census Bureau data, our estimates will not generally agree exactly with those published by the Census Bureau because we include adjustments for survey omissions and corrections for various types of survey errors and anomalies. […]

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    The Religious Typology

    A new analysis looks at beliefs and behaviors that cut across many religious denominations – important traits that unite people of different faiths, or that divide those of the same religious affiliation.