Detlefsen, Kai; Härdle, Wolfgang - 2006
Detlefsen*
Wolfgang Härdle*
* Center for Applied Statistics and Economics (C.A.S.E.),
School of Business and Economics …. H¨ardle2,
1Center for Applied Statistics and Economics, Humboldt Universit¨at zu Berlin,
Spandauer Straße 1, 10178 … Berlin, Germany; e-mail: detlefsen@wiwi.hu-berlin.de;
phone: +49(0)30 2093-5654
2Center for Applied Statistics and Economics …