University of Lüneburg / Institute of Economics / Susanne Soretz University of Lüneburg Working Paper Series / Ingrid Ott Susanne Soretz University of Lüneburg∗ University / /
University of Lüneburg / Institute of Economics / Susanne Soretz University of Lüneburg Working Paper Series / Lüneburg∗ University of Hannover∗∗ / Ingrid Ott Susanne Soretz University / /