Internal migration meant nearly a million people moved from main urban areas between 2000 and 2007-08.

This internal migration could lead to a less entrenched and more diverse electorate - or just even higher levels of home ownership.

Far from an urban renaissance it has seen internal migration from urban areas of more than 900,000 people from 2000-01 and 2007-08 as people voted with their feet.

A general trend of movement from rural to urban areas has also produced a form of internal migration, leading to rapid urbanisation in many countries.

Falling food prices created rural unemployment, which resulted in both emigration and internal migration.