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Washington, DC: Brookings Institution Press, c 2009
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Washington, D.C: The World Bank, 2013 ; 2013
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Washington, D.C: The World Bank, 2013 ; 2013
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Washington, D.C: The World Bank, 2014 ; 2014
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Washington, D.C: The World Bank, 2015
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Washington, D.C: The World Bank, 2010 ; 2010
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Washington, D.C: The World Bank, 2012 ; 2012
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Washington, D.C: The World Bank, 2010 ; 2010
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Washington, D.C: The World Bank, 2009 ; 2009
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Washington, D.C: The World Bank, 2006 ; Online-Ausg.
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Cambridge, Mass: National Bureau of Economic Research, November 2001
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Washington, D.C: The World Bank, 2016
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Cambridge, Mass: National Bureau of Economic Research, 2019
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[S.l.]: SSRN, [2019]
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Washington, D.C: The World Bank, 2022
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Washington, D.C: The World Bank, 2017
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Washington, D.C: The World Bank, 2016
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Washington, D.C: The World Bank, 2016
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Washington, D.C: The World Bank, 2015
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Washington, D.C: The World Bank, 2014 ; 2014