The Nation (Nairobi)
24 October 2008
Since University of Michigan professor C.K. Prahalad wrote 'The Fortune at the Bottom of the Pyramid: Eradicating Poverty Through Profits', investors all over the world have stopped ignoring the poor.
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In the end, probably fibre. The reasons cited in the article are pretty clear, but if anyone really wants to argue about it, it'll just dissolve into a flamewar of academic proportions (which is why I commented. Flamewars are our specialty)