Paraskevi K Salamaliki University of Patras, Department of Economics   University Campus Rio, Achaia 26504 Greece   salamp@upatras.gr   http://application.econ.upatras.gr/node/141           JEL Areas: C2 : Single Equation Models; Single Variables: General E2 : Macroeconomics: Consumption, Saving, Production, Employment, and Investment: General (includes Measurement and Data)