“…And lastly, the modern economic theory on population shows interdependence between these variables. 5 The data set that Chowdhury (1988) uses includes 10 Sub-Saharan African countries -Ethiopia Ghana, Kenya, Somalia, Sudan, Tanzania, Zaire, Cameroon, Ivory Coast, and Nigeria. 2 countries (Ethiopia and Sudan) show the Granger-causality of fertility on infant mortality, one country (Tanzania) indicates the other direction, five countries indicate interdependence (Ghana, Zaire, Cameroon, Ivory Coast, Nigeriathe last three are middle-income countries) supporting the modern economic theory on population, and two countries (Kenya and Somalia) show no causality.…”