 Awon ise deede oju-ojo 1961-1990 sise bi akoko itokasi ipile.. 
Ó jẹ́ ti ọ̀pọ̀lọpọ̀ àwọn ẹgbẹ́ ọ̀jọ̀gbọ́n gẹ́gẹ́bí Nigerian Economic Society, American Economic Association, Royal Economic Society ní United Kingdom, African Finance and Economic Association, International Institute for Public Finance, Nigerian Statistical Association, láàrín àwọn míràn.. 