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Hard-to-reach groups in administrative sources

Paper by Denmark et al. 

This in-depth review deals with the concepts and ways of capturing hard-to reach groups in administrative sources. The document summarizes the experience of national statistical offices in accessing hard-to-reach groups and describes problems and challenges. It also proposes further possible work to improve the access to hard-to-reach groups using administrative data. The last section summarizes the discussion by the Bureau of the Conference of European Statisticians at its meeting in February 2023.