Kazunobu Muro Himeji Dokkyo University   Kamiohno 7-2-1 Himeji, Hyogo 670-8524 JAPAN   muro@gm.himeji-du.ac.jp             JEL Areas: O4 : Economic Growth and Aggregate Productivity: General E2 : Macroeconomics: Consumption, Saving, Production, Employment, and Investment: General (includes Measurement and Data)