In economics, the consumption distribution or consumption inequality is an alternative to the income distribution or wealth distribution for judging economic inequality, comparing levels of consumption or spending rather than income or wealth. This is an important measure of inequality as the basic utility of the wealth or income is the expenditure. People experience the inequality directly in consumption, rather than income or wealth. World Bank lists 118 countries based on consumption inequality compared to 68 countries based on income inequality.
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Consumption inequality in the context of Economic inequality
Economic inequality is an umbrella term for three concepts: income inequality, how the total sum of money paid to people is distributed among them; wealth inequality, how the total sum of wealth owned by people is distributed among the owners; and consumption inequality, how the total sum of money spent by people is distributed among the spenders. Each of these can be measured between two or more nations, within a single nation, or between and within sub-populations (such as within a low-income group, within a high-income group and between them, within an age group and between inter-generational groups, within a gender group and between them etc, either from one or from multiple nations).
Income inequality metrics are used for measuring income inequality, the Gini coefficient being a widely used one. Another type of measurement is the Inequality-adjusted Human Development Index, which is a statistic composite index that takes inequality into account. Important concepts of equality include equity, equality of outcome, and equality of opportunity.
Consumption inequality in the context of Gini coefficient
In economics, the Gini coefficient (/ˈdʒiːni/ JEE-nee), also known as the Gini index or Gini ratio, is a measure of statistical dispersion intended to represent the income inequality, the wealth inequality, or the consumption inequality within a nation or a social group. It was developed by Italian statistician and sociologist Corrado Gini.
The Gini coefficient measures the inequality among the values of a frequency distribution, such as income levels. A Gini coefficient of 0 reflects perfect equality, where all income or wealth values are the same. In contrast, a Gini coefficient of 1 (or 100%) reflects maximal inequality among values, where a single individual has all the income while all others have none.