ABSTRACT
Results presented in the previous chapters come from nine sites in continental sub-Saharan Africa, four in Asia and two from elsewhere. Twelve of these samples had national coverage while the remaining three were restricted to capital cities. Clearly this distribution of research locations prevents any generalization of results to developing countries as a whole and severely curtails inter-regional comparison. On the other hand, the relatively good representation of sites in sub-Saharan Africa may permit the drawing of tentative conclusions at a regional level.
