The collection of the Steinmetz Archive concerns datasets in the field of the social sciences, among which many longitudinal surveys. Part of the collection can be downloaded from the Internet. The NHDA also offers a survey of datasets that are kept elsewhere. The datasets in the collections of the NIWI Data archives are available for re-use. The access conditions range from free access to restricted access via the owner of the data.
More information is available for each collection, and per dataset.