Since 2006 he is the chair of the SVI Endowed Chair for International Direct Marketing at the University of Kassel .
Ralf Wagner ( born 1968 ) is a German university professor for administration in the field of business science at the University of Kassel .
Since 2006 Ralf Wagner is the chair of the SVI Endowed Chair for International Direct Marketing at the University of Kassel .
Ralf Wagner ( born 1968 ) is a German university professor for administration in the field of business science at the University of Kassel .