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Maximilian Bach works at the Federal Statistical Office of Germany (corresponding author, . He was a researcher in the Department of Labour Markets and Social Insurance at ZEW Mannheim when this paper was written. Part of this paper were written while he was a Ph.D. student at the Graduate Center DIW and Humboldt University Berlin.

Stephan Sievert works at the Federal Ministry of Labour and Social Affairs. He was a guest researcher at DIW Berlin when this paper was written.