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Interpretation of Backward-Sloping Labor Supply Curves in Africa

In the January 1970 issue of this journal, Bruce Fetter and I argued that there were grounds for questioning the usual interpretations of the backward-sloping labor supply function reported for much of Africa for the pre-World War II period. We argued that the bend in such curves, the reversal of slope, might not represent unorthodox economic behavior but, rather, was consistent with behavior predicted by economic theory when various costs associated with working-costs perceived by the laborers but not by previous writers discussing labor supply curves in Africa-were taken into account.