Alexander Jung ECB   Kaiserstr. 29 Frankfurt, Hessen 60311 Germany   alexander.jung@ecb.europa.eu   http://www.ecb.europa.eu/home/html/index.en.html           JEL Areas: E5 : Monetary Policy, Central Banking, and the Supply of Money and Credit: General E6 : Macroeconomic Policy, Macroeconomic Aspects of Public Finance, and General