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[S.l.]: SSRN, [2021]

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[S.l.]: SSRN, 2010

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Uppsala: Uppsala University, Department of Economics, 2003

Munich: Center for Economic Studies and Ifo Institute (CESifo), 2003

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Frederiksberg: Copenhagen Business School (CBS), Department of Economics, 2002

Uppsala: Institute for Labour Market Policy Evaluation (IFAU), 2000

[S.l.]: SSRN, 2000