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Berlin: Duncker & Humblot, 1979
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Berlin: Duncker & Humblot, 1999
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Cambridge, Mass: National Bureau of Economic Research, 2022
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[S.l.]: SSRN, [2014]
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Toronto: University of Toronto, Department of Economics, April 14, 2018
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London: CFM, Centre for Macroeconomics, [2014]
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Cambridge, Mass: National Bureau of Economic Research, July 2024
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Seville: European Commission, 2022
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Erlangen-Nürnberg: Univ., Lehrstuhl für Arbeitsmarkt- und Regionalpolitik, 2002