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While such ratios do not represent the overall level of inequality in the population as a whole, they provide measures of the shape of income distribution. For example, the attached graph shows that in the period 1967–2003, US income ratio between median and 10th and 20th percentile did not change significantly, while the ratio between the ...
Zero represents perfect equality (everyone having the same income), while 1 represents perfect inequality (one person receiving all the income). (Index scores are commonly multiplied by 100.) [ 13 ] The CBO explains the Gini as "A standard composite measure of income inequality is the Gini coefficient, which summarizes an entire distribution in ...
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).
This represents an additional $7,000 in wages and salaries for each of the 120 million U.S. households. Larry Summers estimated in 2007 that the lower 80% of families were receiving $664 billion less income than they would be with a 1979 income distribution (a period of much greater equality), or approximately $7,000 per family.
Inequality grew because the ones moving to the private sector would become wealthier in the city with a private-sector job, while the agricultural sector stayed stagnant. Once the transition was over, inequality was at its lowest because the final stages of growth were complete and everyone was sharing in the wealth generated.
The concept of inequality is distinct from that of poverty [5] and fairness. Income inequality metrics (or income distribution metrics) are used by social scientists to measure the distribution of income, and economic inequality among the participants in a particular economy, such as that of a specific country or of the world in general.
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The Atkinson index is defined as: (, …,) = {(=) / (=) / = (,...,) = +where is individual income (i = 1, 2, ..., N) and is the mean income.. In other words, the Atkinson index is the complement to 1 of the ratio of the Hölder generalized mean of exponent 1−ε to the arithmetic mean of the incomes (where as usual the generalized mean of exponent 0 is interpreted as the geometric mean).