1. Hopkins, Economic History. For the general point, see ibid., and the elaboration in Hopkins, ‘Rationality and Technology in African History’, Technology and Culture, 16 (1975), 462–5.
2. Paul Bohannon and George Dalton, ‘Introduction’ to their (eds), Markets in Africa (Illinois, 1962); Dalton, ‘Review of A. G. Hopkins, Economic History of West Africa’, African Economic History, 1 (1976), 51–101.
3. See for example Odile Goerg, ‘La destruction d'un reseau d'echange precolonial: l'exemple de Ia Guinee’, Journal of African History, 21 (1980), 467–84.
4. A. G. Hopkins, ‘Imperial Business in Africa. Part II: Interpretations’, Journal of African History, 17 (1976), 274.
5. Jan S. Hogendorn, Nigerian Groundnut Exports: Origins and Early Development (Zaria, Nigeria, 1978).