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[S.l.]: SSRN, [2013]
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Cambridge, Mass: National Bureau of Economic Research, March 2005
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Cambridge, Mass: National Bureau of Economic Research, January 2017
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[S.l.]: SSRN, [2017]
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[S.l.]: SSRN, [2016]
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[S.l.]: SSRN, [2010]
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[S.l.]: SSRN, [2006]
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Cambridge, Mass: National Bureau of Economic Research, July 2007
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Cambridge, Mass: National Bureau of Economic Research, July 1998
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Cambridge, Mass: National Bureau of Economic Research, February 1999
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Cambridge, Mass: National Bureau of Economic Research, June 1997
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[S.l.]: SSRN, 2004
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[S.l.]: SSRN, [2014]
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[S.l.]: SSRN, [2014]
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Cambridge, Mass: National Bureau of Economic Research, March 2011
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Cambridge, Mass: National Bureau of Economic Research, October 2007
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Cambridge, Mass: National Bureau of Economic Research, February 2002
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Washington, D.C: World Bank, Poverty and Human Resources, Development Research Group, [2001] ; Online-Ausg.
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[S.l.]: SSRN, [2021]
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Cambridge, Mass: National Bureau of Economic Research, 2021