Kornelius Kraft University of Essen   Department of Economics University of Essen Universitätsstrasse 12 D-45141 Essen, Germany D-45141 Germany   kraft@wipol.uni-essen.de   http://www.vwl.uni-essen.de/dt/wipol/welcome.html   Biographical Sketch: 1979 Diplom Volkswirt University of Heidelberg 1984 Ph.D in Economics University of Kassel 1989 Habilitation University of Kassel 1980-1986 Reserch Fellow, International Institute of Management, Berlin 1986-1992 Assistant, University of Kassel 1992-1993 Professor of Economics, University of Fribourg, Switzerland 1993- Professor of Economics, University of Essen   Primary Research Focus: Labor Economics, Industrial Organization   JEL Areas: J0 : Labor and Demographic Economics: General L0 : Industrial Organization: General