The fast-growing use of cell phones in Africa — where many people lack the basic human necessities — has made headlines worldwide the past few years. The surprising boom has led to widespread speculation — and hope — that cell phones could potentially transform the impoverished continent. But new research by economists Isaac M. Mbiti and Jenny C. Aker finds that cell phones — while a useful and powerful tool for many people in Africa — cannot drive economic development on their own. Mbiti, at...
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