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Washington, D.C: World Bank, [2004] ; Online-Ausg.
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Cambridge, Mass: National Bureau of Economic Research, February 2016
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[S.l.]: SSRN, [2016]
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Cambridge, Mass: National Bureau of Economic Research, January 2015
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[S.l.]: SSRN, [2015]
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[S.l.]: SSRN, [2016]
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[S.l.]: SSRN, [2014]
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Cambridge, Mass: National Bureau of Economic Research, September 2014
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[S.l.]: SSRN, [2014]
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Cambridge, Mass: National Bureau of Economic Research, November 2013
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[S.l.]: SSRN, [2013]
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[S.l.]: SSRN, [2012]
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Cambridge, Mass: National Bureau of Economic Research, February 2007
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Cambridge, Mass: National Bureau of Economic Research, January 2005
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Cambridge, Mass: National Bureau of Economic Research, February 2004
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Cambridge, Mass: National Bureau of Economic Research, June 2004
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Cambridge, Mass: National Bureau of Economic Research, January 2002
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Cambridge, Mass: National Bureau of Economic Research, January 2003
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Cambridge, Mass: National Bureau of Economic Research, December 2001
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Cambridge, Mass: National Bureau of Economic Research, November 2001