Iyipada oju-ojo le waye lori awon akoko gigun ati kukuru lati orisirisi awon ifosiwewe.. 
O ti SAY (Igbimọ Síbẹ̀) fun ọpọlọpọ awọn orilẹ-ede ati awọn ajo agbaye gẹgẹbi National PLANNING Commission of Nigeria, banki agbaye, International Monetary Fund (IMf), Economic Commission for Africa (lèròlẹ), African Economic Research Conyááfì (Ac) ni Kenya, Neti agbaye ni India, Apejọ ti Federations ní Canada, laarin awọn miiran.. 