Joseph A Omojolaibi DEPARMENT OF ECONOMICS, FACULTY OF SOCIAL SCIENCES, UNIVERSITY OF LAGOS, AKOKA, LAGOS, NIGERIA   DEPT. OF ECONS. UNIVERSITY OF LAGOS. LAGOS, LAGOS +234 NIGERIA   omojo_laibi@yahoo.com             JEL Areas: C5 : Econometric Modeling: General C3 : Multiple or Simultaneous Equation Models: General