Michael Gail Universitaet Siegen   Fachbereich Wirtschaftswissenschaften Volkswirtschaftslehre V Siegen, 57068 Germany   gail@vwl.wiwi.uni-siegen.de   http://www.uni-siegen.de/~vwlv/           JEL Areas: E5 : Monetary Policy, Central Banking, and the Supply of Money and Credit: General E3 : Prices, Business Fluctuations, and Cycles: General (includes Measurement and Data)