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Social inequality usually implies the lack of equality of outcome, but may alternatively be conceptualized as a lack of equality in access to opportunity. [1] Social inequality is linked to economic inequality, usually described as the basis of the unequal distribution of income or wealth.
The Galor-Zeira model, established by Oded Galor and Joseph Zeira in 1988, is the first macroeconomic model to examine the influence of economic inequality on macroeconomic dynamics. The model disputes the previously prevalent view, held by the representative agent approach in macroeconomics till the early 1990s, that economic inequality has no ...
In the discrete case, an economic inequality index may be represented by a function I(x), where x is a set of n economic values (e.g. wealth or income) x={x 1,x 2,...,x n} with x i being the economic value associated with "economic agent" i.
Income inequality has fluctuated considerably since measurements began around 1915, declining between peaks in the 1920s and 2007 (CBO data [2]) or 2012 (Piketty, Saez, Zucman data [15]). Inequality steadily increased from around 1979 to 2007, with a small reduction through 2016, [2] [16] [17] followed by an increase from 2016 to 2018. [18]
[8]: 208 Inequality has risen in most developed countries since the 1960s, so graphs of inequality over time no longer display a Kuznets curve. Piketty has argued that the decline in inequality over the first half of the 20th century was a once-off effect due to the destruction of large concentrations of wealth by war and economic depression.
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).
A plot of intergenerational immobility against inequality, with the US highlighted in red (data from 2012) The "Great Gatsby Curve" is the term given to the positive empirical relationship between cross-sectional income inequality and persistence of income across generations. [1]
The Atkinson Index and the related generalized entropy index satisfy the principle - any transfer from someone relatively poorer to someone relatively richer will increase inequality as measured by the index. For the Atkinson index, this holds when the inequality aversion parameter is nonnegative, which is the defining case.