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Heidelberg: Winter, 2004
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Chapel Hill; London: The University of North Carolina Press, [2002]
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Lewiston, NY [u.a.]: Mellen, 2007
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Philadelphia, Pa.: University of Pennsylvania Press, 2010
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Cambridge, Mass: National Bureau of Economic Research, January 2011
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Cambridge, Mass: National Bureau of Economic Research, August 2018
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Bonn, Germany: IZA - Institute of Labor Economics, March 2019
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Frankfurt; New York: Campus Verlag, [2016]