Thepthida Sopraseuth Thema, CY Cergy Paris Université   University of Cergy Pontoise UFR d'Economie et Gestion 33, boulevard du Port Cergy-Pontoise Cedex, 95011 France   Thepthida.Sopraseuth@u-cergy.fr   thepthida.sopraseuth.free.fr/           JEL Areas: E2 : Macroeconomics: Consumption, Saving, Production, Employment, and Investment: General (includes Measurement and Data) F4 : Macroeconomic Aspects of International Trade and Finance: General