I guess I better study this one.
By Heike Hennig-Schmidt and Gari Walkowitz.
http://www.cgs.uni-koeln.de/fileadmin/wiso_fak/cgs/pdf/working_paper/cgswp_06-01.pdf
By Heike Hennig-Schmidt and Gari Walkowitz.
http://www.cgs.uni-koeln.de/fileadmin/wiso_fak/cgs/pdf/working_paper/cgswp_06-01.pdf