Defining urban

A minimum population of 5,000 persons

At least 75 per cent of the male population engaged in non-agricultural pursuits

Population density of at least 400 persons per sq km

All statutory towns having a municipality

International research on the economy of urban areas suggests

That they are generators of employment and income

That urban labour markets in developing countries have become increasingly segmented, broadly into formal and informal

That there are barriers of different kinds that impede movement between the formal and the informal sectors