First Author:   Hans-Eggert Reimers Economics Department, Hochschule Wismar h.reimers@wi.hs-wismar.de   Hochschule Wismar, Fachbereich Wirtschaft, Postfach 1210 Wismar, D-23952, Germany       Second Author: Helmut Herwartz Institute of Statistics and Econometrics, Humboldt-University Berlin helmut@wiwi.hu-berlin.de   Institute of Statistics and Econometrics, Humboldt-University Berlin, Spandauer Str. 1 Berlin, D-10178, Germany