Nigerians from elsewhere point out that the oil industry was originally devloped with money earned from groundnuts from the north, coal from the east, tin from the middle belt and cocoa from the west.

BBC: Oil wealth: An unequal bounty

In Zambia, say, a poor person is defined as someone who cannot afford to buy at least two to three plates of nshima (a kind of porridge), a sweet potato, a few spoonfuls of oil, a handful of groundnuts and a couple of teaspoons of sugar each day, plus a banana and a chicken twice a week.

ECONOMIST: Has ��a dollar a day�� had its day?