Sirikwan Jaroenwiriyakul by email   199 Sukumvit Road Tunksukra Sriracha, Chonburi 20230 Thailand   sirikwan.j@hotmail.com             JEL Areas: C8 : Data Collection and Data Estimation Methodology; Computer Programs: General E3 : Prices, Business Fluctuations, and Cycles: General (includes Measurement and Data)