trang nguyen National Economics University   PO Box, No 123, 175 Dinh Tien Hoang, Hanoi Hanoi, Hanoi 084 Vietnam   queenbee_ntt@yahoo.com   http://da   Biographical Sketch: I have studied economis since I was 15. It's my favourit.   Primary Research Focus: National economics   JEL Areas: A0 : General Economics and Teaching B0 : Schools of Economic Thought and Methodology: General