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  • press release

    Summary of findings: Europe’s Unauthorized Immigrant Population Peaks in 2016, Then Levels Off

    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 […]

  • report

    Appendix A: Survey methodology

    This report included six online platforms used for public polling. Three are opt-in survey panels or “marketplaces.” One is an opt-in crowdsourcing labor website. Two are survey panels that interview online but recruit offline, one of which is Pew Research Center’s American Trends Panel. For both panels recruited offline, most panelists were recruited using address-based […]

  • report

    3. Concerns about democracy in the digital age

    About half of the experts responding to this canvassing said people’s uses of technology will mostly weaken core aspects of democracy and democratic representation, but even those who expressed optimism often voiced concerns. This section includes comments about problems that were made by all respondents regardless of their answer to the main question about the […]

  • report

    Methodology

    This study is based on an analysis of 49,719 sermons, delivered between April 7 and June 1, 2019, and collected from the websites of 6,431 churches found via the Google Places application programming interface (API), a tool that provides information about establishments, geographic locations or points of interest listed on Google Maps. Pew Research Center […]

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