Yabibal M. Walle Institute of Statistics and Econometrics, Christian-Albrechts-Universität zu Kiel, Germany   Institute of Statistics and Econometrics Christian-Albrechts-University of Kiel Olshausenstrasse 40 - 60 Kiel, D-24118 Germany   yabibalm@stat-econ.uni-kiel.de   http://www.stat-econ.uni-kiel.de           JEL Areas: O4 : Economic Growth and Aggregate Productivity: General G0 : Financial Economics: General