Income inequality and fertility: A comparative view

Summary Most studies pertaining to the relationship between population and economic development suffer from a major flaw. Researchers use aggregate measures like income or energy consumption per head as indicators of economic development. Such aggregate measures fail to take into account the nature of the distribution of income or energy consumption to the population. The present study attempts to demonstrate the importance of incorporating the nature of distribution of resources as an important intervening variable in the study of the overall relationship between population and economic development. A measure of income inequality is developed which represents the difference between rural and urban incomes. This measure is justified in terms of the distinctiveness of urban and rural sectors in the process of development. The data used relate to societal measures of fertility, income, income inequality, etc. Consistently with existing literature, we observe that, generally speaking, economic development does entail a reduction in rural-urban income inequalities. On the other hand, a substantial part of the negative effect of an increase in income per head can be nullified if such an increase were not also accompanied by a reduction in rural-urban income inequality. Also, a substantial part of the negative effect of an increase in income per head and the level of education in reducing the level of infant mortality would be nullified if it did not also result in a reduction of rural-urban income inequality. On the other hand, it is quite possible for the level of education in a society to increase together with an increase in income per head without substantially altering the extent of inequality of income between the rural and the urban population. It is suggested that the positive relationship between rural-urban income inequality and the level of fertility is due to higher rural fertility rates in a high-inequality country. By implication, this would mean that higher standards of living for the rural population compared with its urban counterpart will have a favourable impact in reducing rural fertility.