1. Raising Income: The first important role is that industrial development provide a secure basis for a rapid growth of income. The empirical evidence suggests a close correspondence between the high level of income and industrial development. In the industrially developed countries, for example, the GNP per capita income is very high at around $ 28,000. Whereas for the industrially backward countries it is very low at around $ 400 only.
2. Changing the Structure of the Economy: In order to develop the economy underdeveloped countries need structural change through industrialization. History shows that in the process of becoming developed economy the share of the industrial sector should rise and that of the agricultural sector decline. This is only possible through deliberate industrialization. As a result, the benefits of industrialization will ‘trickle down’ to the other sectors of the economy in the form of the development of agricultural and service sectors leading to the rise in employment, output and income.
3. Meeting High-Income Demands: Beyond certain limits, the demands of the people are usually for industrial products alone. After having met the needs of food, income of the people are spent mostly on manufactured goods. This means the income-elasticity of demand for the manufactured goods is high and that of agricultural products is low. To meet these demands and increase the economy’s output underdeveloped countries need industrialization.
4. Overcoming Deterioration in the Terms of Trade: Underdeveloped countries like India need