The SUMFOLK database contains a compilation of the aggregated population reports for the years 1895-1930 made by Gunnar Myrdal's research group during the 1930s. They are based on information sent to Statistics Sweden (SCB) by the country's ministers. There is information on migration, population and the number of births and deaths at parish level. Myrdal's research group extracted certain information from the original forms to their own excerpt forms. These excerpts have been registered by Demographic Data Base (DDB) and are available in the SUMFOLK database.

This dataset was generated through the Diversity Barometer, a study tracking attitudes towards ethnic diversity and immigration in Sweden since 2005. The data were collected annually between 2005 and 2014, and biennially thereafter. Unweighted samples, consisting of adults aged between 18 and 75 years were used. The data can be managed and analyzed in the statistical program SPSS. The dataset includes the following variable categories: 1. Respondent descriptives 2. Interaction with persons with foreign background at school, work and in the neighborhood. 3. Cultural rights for persons with foreign background. 4. Social rights for persons with foreign background. 5. Immigration as beneficial to the Swedish society. 6. Immigration as a threat to the Swedish society. 7. Attitudes towards Swedish immigration policies. 8. Immigrants are exploited in the Swedish labor market. 9. Interest in interacting with immigrants and learning foreign cultures. 10. Attitudes towards religion in general, and Islam in particular. 11. Willingness to live in the same neighborhood as immigrants. 12. Immigrant-neighborhoods are problem neighborhoods.