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Concept# Economic inequality

Summary

Economic inequality is an umbrella term for a) income inequality or distribution of income (how the total sum of money paid to people is distributed among them), b) wealth inequality or distribution of wealth (how the total sum of wealth owned by people is distributed among the owners), and c) 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 the 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.
Whereas globalization has reduced the inequality between nations, it has increased the inequality within the population in most nations. Income inequality between nations peaked in the 1970s, when world income was distributed bimodally into "rich" and "poor" countries. Since then, income levels across countries have been converging, with most people now living in middle-income countries. However, inequality within the population in most has risen significantly in the last 30 years, particularly among advanced countries. In this period, approximately 90 percent of advanced nations increased their income inequality with over 70% nations recording their Gini coefficient increase, exceeding two points.
Research has generally linked economic inequality to political and social instability, including revolution, democratic breakdown and civil conflict.

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Wealth

Wealth is the abundance of valuable financial assets or physical possessions which can be converted into a form that can be used for transactions. This includes the core meaning as held in the originating Old English word weal, which is from an Indo-European word stem. The modern concept of wealth is of significance in all areas of economics, and clearly so for growth economics and development economics, yet the meaning of wealth is context-dependent. A person possessing a substantial net worth is known as wealthy.

Gini coefficient

In economics, the Gini coefficient (ˈdʒiːni ), 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 levels of income.

Economic inequality

Economic inequality is an umbrella term for a) income inequality or distribution of income (how the total sum of money paid to people is distributed among them), b) wealth inequality or distribution of wealth (how the total sum of wealth owned by people is distributed among the owners), and c) consumption inequality (how the total sum of money spent by people is distributed among the spenders).

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