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Cambridge, Massachusetts; London, England: The MIT Press, [2003]
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[S.l.]: SSRN, [2020]
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[S.l.]: SSRN, [2016]
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[S.l.]: SSRN, [2015]
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Bonn: Institute for the Study of Labor (IZA), 2015
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Cambridge, Mass: National Bureau of Economic Research, February 2013
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[S.l.]: SSRN, [2013]
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[S.l.]: SSRN, [2013]
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[S.l.]: SSRN, [2014]
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[S.l.]: SSRN, [2012]
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[S.l.]: SSRN, [2011]
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[S.l.]: SSRN, [2011]
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[S.l.]: SSRN, [2011]
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[S.l.]: SSRN, [2011]
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[S.l.]: SSRN, [2010]
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[S.l.]: SSRN, [2006]
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[S.l.]: SSRN, 2000
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Cambridge, Mass: National Bureau of Economic Research, July 2000
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Cambridge, Mass: National Bureau of Economic Research, May 1997