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Berlin; New York: Walter de Gruyter, 1986
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New York, NY, United States of America; Oxford: Oxford University Press, [2016]
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Münster: Westfälisches Dampfboot, 1995
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Berlin New York, N.Y.: de Gruyter, 1994
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Mississauga, Ont.: Wiley & Sons Canada, c2007
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Frankfurt; New York: Campus Verlag, [2016]
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Bonn, Germany: IZA, January 2018
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Bonn: Institute for the Study of Labor (IZA), 1999
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Cambridge, Mass: National Bureau of Economic Research, May 2023
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Stanford, CA: SIEPR Stanford Institute for Economic Policy Research, 2021
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Köln: Institut der Deutschen Wirtschaft e.V., 19.01.2022
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Cambridge, Mass: National Bureau of Economic Research, April 2024
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Mannheim: MZES, 2001
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Cambridge, Mass: National Bureau of Economic Research, January 2024
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Cambridge, Mass: National Bureau of Economic Research, June 2022
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New York, NY, United States of America; Oxford: Oxford University Press, 2016
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Cambridge, Mass: National Bureau of Economic Research, April 2024
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Chicago; London: The University of Chicago Press, 2018
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Berlin ;New York: Walter de Gruyter, 2011 ; 2011
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Berlin ;Boston: De Gruyter, 2018