Thomas Steger Swiss Federal InstituteLeipzig University of Technology Zurich   Leipzig University ETH Zentrum, WET D 6, CH - 8092 Zurich ,   steger@wifa.uni-leipzig.de   http://www.wif.ethz.ch/resec/whoiswho/steger.htm   Biographical Sketch: Thomas Steger       JEL Areas: E0 : Macroeconomics and Monetary Economics: General O4 : Economic Growth and Aggregate Productivity: General