The widely reviled head of the electoral commission, Maurice Iwu, was recently replaced by that rarest of Nigerians, a public figure held in high esteem in all regions.

The ratio of GDP per head in the three richest regions to the three poorest increased by almost a tenth between 1990 and 2009.

This model is applied for runoff from 1961 to 2000 of the Head Regions of the Yellow River, the results show that the calculation results are almost identical to the observed data.