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Cambridge, Mass: National Bureau of Economic Research, September 2012
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Cambridge, Mass: National Bureau of Economic Research, July 2011
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Cambridge, Mass: National Bureau of Economic Research, December 2011
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Cambridge, Mass: National Bureau of Economic Research, December 2008
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Cambridge, Mass: National Bureau of Economic Research, January 1995
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Cambridge, Mass: National Bureau of Economic Research, October 1996
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Cambridge, Mass: National Bureau of Economic Research, 2020
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Cambridge, Mass: National Bureau of Economic Research, March 2008
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Cambridge, Mass: National Bureau of Economic Research, December 2017
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Cambridge, Mass: National Bureau of Economic Research, December 2016
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Cambridge, Mass: National Bureau of Economic Research, November 2014
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Cambridge, Mass: National Bureau of Economic Research, September 2007
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Cambridge, Mass: National Bureau of Economic Research, March 2023
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Cambridge, Mass: National Bureau of Economic Research, 2021
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Stockholm: Research Institute of Industrial Economics (IFN), 2012
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Washington, DC, 1974 ; Online-Ausg.: Chester, Vt: NewsBank, inc, 2009
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MPS Records, 200624
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Washington, DC, 1968 ; Online-Ausg.: Chester, Vt: NewsBank, inc, 2008
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Washington, DC, 1968 ; Online-Ausg.: Chester, Vt: NewsBank, inc, 2008
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Washington, DC, 1967 ; Online-Ausg.: Chester, Vt: NewsBank, inc, 2008