What is NAPP?
The North Atlantic Population Project (NAPP) is a machine-readable database of the 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.
The NAPP database has enabled linking of individuals between census years for longitudinal analysis. NAPP includes samples of the United States that link 1880 to seven other census years, samples for Norway that link males and couples between the 1865, 1875, and 1900 censuses.
To allow the comparative analysis of human behavior, the record layouts, coding schemes, and documentation in NAPP are consistent across censuses. NAPP assigns uniform codes across all censuses and brings relevant documentation into a coherent form, to facilitate analysis of social and economic change. NAPP data are also compatible with the existing IPUMS series of U.S. census samples.
NAPP is a collaborative project carried out at the Minnesota Population Center, University of Minnesota, in conjunction with several 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. The material currently in the NAPP database is the foundation for a long-run collaborative enterprise to reconstruct the population of the North Atlantic world from the mid-nineteenth century to the present.