In general, price discrimination occurs when a producer sells a commodity to different buyers at different prices for reasons not associated with differences in cost. For example, doctors, lawyers and engineer sometimes vary their fees according to the incomes of their clients. Cinemas also charge lower admission prices for children.

The Northern People’s Congress (NPC) was the first major political party in Northern Nigeria. It began as Jamiyar Mutanen Arewa (JMA) in 1948. The party was formally launched in October 1951.