North Atlantic Population Project
The North Atlantic Population Project (NAPP) supplements IPUMS-International with historical complete censuses of Canada (1881), Denmark (1787, 1801), Great Britain (1851, 1861, Scotland 1871, 1881, 1891, 1901, 1911), Norway (1801, 1865, 1900, 1910), Sweden (1880, 1890, 1900, 1910), the United States (1850, 1880), and Iceland (1703, 1729, 1801, 1901, 1910). These censuses comprise our richest source of information on the population of the North Atlantic world in the late nineteenth century, and they have only recently become available for social science research. Samples of census data are also available for Canada (1852, 1871, 1891, 1901, 1911), Great Britain (1851), the German state of Mecklenburg-Schwerin (1819), Norway (1875), and the United States (1850, 1860, 1870, 1880, 1900, 1910), which support cross-temporal analyses. An overview describes the original conception and goals of the NAPP project.
The historical datasets contain names, enabling linking of individuals between census years for longitudinal analysis. Separate files provide U.S. samples linking men, women, and couples between the full-count 1880 dataset and seven other census years. Males and couples are also linked between adjoining censuses of Norway for 1865, 1875, and 1900.
The NAPP datasets existed in their own harmonized database prior to incorporation into IPUMS International in 2018. All information was retained from the historical datasets during the merger, but some variable names and codes were altered. A crosswalk identifies variable name changes, for the benefit of users of the prior version.
NAPP is a collaborative effort between IPUMS and numerous international partners: University of Ottawa, Université de Montréal, Danish National Archives, University of Essex, National Archives of Iceland, Statistics Iceland, University of Iceland, National Archives of Sweden, Stockholms Stadsarkiv, Umeå University, University of Bergen, University of Tromsø, National Archives in Oslo, Max Planck Institute for Demographic Research, University of Rostock, and the Landeshauptarchiv (State Main Archive) Schwerin. Full-count United States data were created in collaboration with the Church of Jesus Christ of Latter-day Saints.