of the staff of the Central African Statistical Office and the
Central African Archives.

I am grateful to the editors of Economic Development and Cul-
tural Change and Oxford Economic Papers for their permission to
use portions of materials published in those journals. Part of the
discussion in chapter IV appeared in Economic Development and
Cultural Change, April 1960, and, in modified form, portions of
the argument in chapter VIII appeared in Oxford Economic Papers,
February 1961.

Throughout the preparation of this study my labours have
been eased immeasurably by the encouragement and patience
of my wife. Her support has been invaluable.

March 1961 W. J. B.

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