Average income, i.e., percapita incomeisan important but notthe only criterion for development. Along with average income, equitable distribution of income (i.e., people are neither very rich nor extremely poor) in a country should also be considered. If the national income is widely distributed among the people, It shows a better distribution of income. High per capita income combined with a better distribution of income is a good index of economic welfare.
Besides size of per capita income, what other property of income is important in comparing two or more societies?