Ọmọ orilẹede South Africa kan to jẹ onimọ nipa ọ̀rọ̀ aje, Carlene van Westhuizen, sọ ninu abọ iwadi kan to ṣe fun ile ẹ̀kọ́ Brookings Institution to wa ni orilẹede America sọ pe "awọn talaka ko fi bẹ ẹ janfaani idagbasoke to ba ọrọ̀ aje.
