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    Methodology

    This methodology explains how we estimated the religious composition of foreign-born populations around the world. It describes the data sources we used to measure the number of migrants from each origin country living in each destination country, as well as the data sources and methods we used to estimate the religious composition of migrants. A […]

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    Methodology B: Survey data on immigrants

    This report presents estimates of the number of unauthorized immigrants in the United States as of July 2023 and for earlier years. As noted earlier in this report, the estimates presented here supersede all previously published Pew Research Center estimates. The principal survey data used to produce the estimates and modifications made to the underlying […]

  • report

    1. Religious change in China

    It is unclear whether there has been any significant change since 2010 in the percentage of Chinese adults who identify with a religion or engage in religious beliefs or practices. Some scholars have relied on a mix of fieldwork studies, claims by religious organizations, journalists’ observations and government statistics to suggest that China is experiencing […]

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