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Cheltenham, UK; Northampton, MA: Edward Elgar Publishing, [2019]
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München: Utz, Wiss., 2000
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Strasbourg: Conseil de l'Europe, 1989
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2023
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2021
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Berlin: Deutsches Institut für Wirtschaftsforschung (DIW), 2007
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Singapore: Springer Singapore, 2022. ; Singapore: Imprint: Springer, 2022.
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2022
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Calgary: International Telecommunications Society (ITS), 2017
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Cheltenham, UK; Northampton, MA, USA: Edward Elgar Publishing, 2019
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Bonn: Institute for the Study of Labor (IZA), 2012
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World Bank, Washington, DC, 2003
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Wiesbaden: Springer Gabler, 2017
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Cambridge, Mass: National Bureau of Economic Research, May 2022
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World Bank, Washington, DC, 2012
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Washington, DC, 2012
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Paris : OECD Publishing.
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[S.l.]: SSRN, [2013]
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Mannheim: ZEW, 2010
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Mannheim: Zentrum für Europäische Wirtschaftsforschung (ZEW), 2010