Chingmong Marma Athurugiriya   Abayadharshanaramaya, M.D.H Jayawardhana MA,Abhayapura Athurugiriya, no 0094 Srilanka   chingmarma@yahoo.co.in   no           JEL Areas: C2 : Single Equation Models; Single Variables: General B3 : History of Thought: Individuals: General