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Rostock: Universität Rostock, Institut für Volkswirtschaftslehre, 1998
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Munich: Center for Economic Studies and ifo Institute (CESifo), 2013
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Bonn: Institute for the Study of Labor (IZA), 2008
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Amsterdam and Rotterdam: Tinbergen Institute, 2008
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Munich: Center for Economic Studies and ifo Institute (CESifo), 2008
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Munich: Center for Economic Studies and ifo Institute (CESifo), 2006
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Bonn: Institute for the Study of Labor (IZA), 2006
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Amsterdam and Rotterdam: Tinbergen Institute, 2005
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Milano: Fondazione Eni Enrico Mattei (FEEM), 2004
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Leuven: Katholieke Universiteit Leuven, LICOS Centre for Transition Economics, 2002
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2019
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Cambridge: University of Cambridge, Faculty of Economics, September 2017
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Durham, NC: Duke Univ., Dep. of Economics, 2015
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Cambridge, Mass: National Bureau of Economic Research, November 2014
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[S.l.]: SSRN, [2014]
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2021
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New Haven, CT: The Econometric Society, 2019
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Kalamazoo, MI: W.E. Upjohn Institute for Employment Research, 1990
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2021
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Berlin: Wissenschaftszentrum Berlin für Sozialforschung (WZB), 2012