The Trade between Western Africa and the Atlantic World, 1600–90: Estimates of Trends in Composition and Value

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Abstract
Extending the approach of D. Eltis and L. C. Jennings to the seventeenth century, the author takes estimates for the decades 1623–32 and 1680–90 as the starting points for his discussion of trends in the composition and value of the Atlantic imports and exports of Western Africa. Contrary to prevalent opinion, he argues that at least from 1600 onwards the value of slave exports was two to three times higher than that of commodity exports, as measured according to the prices in America and Europe. However, during most of the century more imports were bartered in the commodity trade than in the slave trade, since the trading margin in the latter sector was considerably higher than in the former. The different margins go some way to explaining why the Portuguese concentrated on the slave trade from Angola between 1600 and 1635, which they could carry on with fewer European imports and more effectively protect, while the more efficient Dutch merchants achieved primacy in the competitive commodity trade of West Africa. The different margins also meant a very uneven distribution of imports over coastal regions. Owing to the predominance of Akan gold in the commodity trade, the Gold Coast drew an estimated fifty per cent of all imports at the beginning of the century and still accounted for 34 per cent at the end. Owing to its predominance in the slave trade, West-Central Africa drew 25 per cent of all imports throughout the century. The few available data on the composition of imports suggest that there may have been a shift from metal goods to textiles and a marked increase of Asian textiles and cowries. From 1593 on the Dutch may have initiated a shift in the gross barter terms of trade in favour of the African merchants which spread from the Gold Coast to other areas when the North-west Europeans obtained the major share in the Atlantic slave trade.

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