Chang-Ching Lin Academia Sinica   128 Yen-Chiu-Yuan Road, Sec.2 Taipei, 115 Taiwan   lincc@econ.sinica.edu.tw             JEL Areas: E2 : Macroeconomics: Consumption, Saving, Production, Employment, and Investment: General (includes Measurement and Data) C3 : Multiple or Simultaneous Equation Models: General