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Wien: WIFO, 1999
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Vienna: Austrian Institute of Economic Research (WIFO), 1999
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Vienna: Austrian Institute of Economic Research (WIFO), 2012
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Vienna: Austrian Institute of Economic Research (WIFO), 2010
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Vienna: Austrian Institute of Economic Research (WIFO), 2010
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Vienna: Austrian Institute of Economic Research (WIFO), 2008
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Vienna: Austrian Institute of Economic Research (WIFO), 2008
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Vienna: Austrian Institute of Economic Research (WIFO), 2006
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Vienna: Austrian Institute of Economic Research (WIFO), 2004
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Vienna: Austrian Institute of Economic Research (WIFO), 2004
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Linz: Johannes Kepler University of Linz, Department of Economics, 2004
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Vienna: Austrian Institute of Economic Research (WIFO), 2004
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Vienna: Austrian Institute of Economic Research (WIFO), 2003
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Vienna: Austrian Institute of Economic Research (WIFO), 2001
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Vienna: Austrian Institute of Economic Research (WIFO), 1998
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Vienna: Austrian Institute of Economic Research (WIFO), 2009
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Vienna: Austrian Institute of Economic Research (WIFO), 2009
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Vienna: Austrian Institute of Economic Research (WIFO), 2008
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Vienna: Austrian Institute of Economic Research (WIFO), 2004
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Wien: Bundesministerium für Arbeit, Soziales und Konsumentenschutz, Oktober 2009