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Bonn: Institute for the Study of Labor (IZA), 2001
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World Bank, Washington, DC, 2003
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World Bank, Washington, DC, 2001
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World Bank, Washington, DC, 2011
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World Bank, Washington, DC, 2003
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World Bank, Washington, DC, 2013
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World Bank, Washington, DC, 2012
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Moscow, 2014
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MedCrave Group Kft., 2023
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MedCrave Group Kft., 2020