Edit IndicatorForm: GINI index (World Bank estimate)

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Related indicators	<ul> <li>[[Atkinson Coefficient (epsilon=0.5)]]</li> <li>[[Atkinson Coefficient (epsilon=1)]]</li> <li>[[Gini Coefficient (LIS)]]</li> <li>[[Gini (at disposable income post taxes & transfers)]]</li> <li>[[Income inequality: S80/S20 disposable income quintile share]]</li> <li>[[Income inequality: P90/P10 disposable income decile ratio]]</li> <li>[[Income inequality: P90/P50 disposable income decile ratio]]</li> <li>[[Income inequality: P50/P10 disposable income decile ratio]]</li> </ul>
Description*	The Gini index measures how much the distribution of income or consumption expenditure among individuals or households in an economy deviates from perfect equality. The Lorenz curve shows the cumulative share of total income or consumption expenditure by a growing number of recipients, beginning with the poorest. The Gini index calculates the area between the Lorenz curve and a hypothetical line of perfect equality, expressed as a percentage of the total area under this line. As a result, a Gini index of 0 represents total equality, while an index of 100 denotes complete inequality.
Coding rules	The Gini Index ranges between "0" and "100". "100" refers to a complete unequal distribution of income or consumption expenditure and "0" to a complete equal distribution of income or consumption expenditure. Teorell et al. (2024:1506) define the variable as "Gini index measures the extent to which the distribution of income (or, in some cases, consumption expenditure) among individuals or households within an economy deviates from a perfectly equal distribution. A Lorenz curve plots the cumulative percentages of total income received against the cumulative number of recipients, starting with the poorest individual or household. The Gini index measures the area between the Lorenz curve and a hypothetical line of absolute equality, expressed as a percentage of the maximum area under the line. Thus a Gini index of 0 represents perfect equality, while an index of 100 implies perfect inequality." <br> The Gini coefficient measures relative rather than absolute wealth. It is not additive across groups, therefore a society's total Gini does not equal the sum of its subgroup Ginis. It is not additive across groups, which means that a society's total Gini does not equal the sum of its sub-group Ginis. Thus, country-level Gini coefficients cannot be aggregated into regional or global Gini coefficients, but a Gini coefficient can be calculated for the aggregate.Because the methodologies and types of welfare measures obtained in the underlying household surveys differ, data are not perfectly comparable between countries or even years within a country. Two types of noncomparability should be considered, particularly for income distributions.First, the surveys can differ in a variety of ways, such as whether they use income or consumption expenditure as a measure of living standards. Income distributions are often more uneven than consumption distributions. Furthermore, income criteria vary more frequently between polls. Consumption is usually a considerably superior welfare indicator, especially in poor countries. Second, households differ in size (number of members) and in the amount to which members share their income. Individuals' ages and consumption demands vary. Differences between countries in these respects may affect distributional comparisons. To improve comparability, the WB has prioritized consumption over income. Income distribution and Gini indexes for high-income economies are generated directly from the Luxembourg Income Study database, using an estimating procedure similar to that used for impoverished countries (see World Bank 2023).
Citation	<ul> <li> Teorell, Jan, Aksel Sundström, Sören Holmberg, Bo Rothstein, Natalia Alvarado Pachon, Cem Mert Dalli, Rafael Lopez Valverde & Paula Nilsson (2024). The Quality of Government Standard Dataset, version Jan24. University of Gothenburg: The Quality of Government Institute, https://www.gu.se/en/quality-government, doi:10.18157/qogstdjan24</li> <li>World Bank. (2023). World development indicators. The World Bank Washington DC. https://databank.worldbank.org/source/world-development-indicators</li> </ul>
Related publications	<ul> <li>World Bank. (2024). Poverty and Inequality Platform Methodology Handbook. Edition 2024-09. Available at https://datanalytics.worldbank.org/PIP-Methodology/</li> <li>Kohli, Martin, Künemund, Harald, Schäfer, Andrea, Schupp, Jürgen and Vogel, Claudia (2006). Erbschaften und ihr Einfluss auf die Vermögensverteilung, in: Vierteljahrshefte zur Wirtschaftsforschung, 75 (1) p.58-76. https://doi.org/10.3790/vjh.75.1.58 </li> </ul>
Project manager(s)*	Responsible for data editing, description (WESIS) and entry: Andrea Schäfer (2021-2025, Version 0.002), Jean-Yves Gerlitz (2018-2020; Version 0.001); Principal Investigator: Irene Dingeldey, Ulrich Mückenberger; Student assistants: Karolin Meyer (2018-2020)
Data release	<ul> <li>Version 0.001: Initial release with data The Quality of Government Standard Dataset, version Jan19</li> <li>Version 0.002: Updated with data from The Quality of Government Standard Dataset, version January 2024</li> </ul>
Revisions	No revisions yet
Sources	<ul> <li>Teorell, Jan, Stefan Dahlberg, Sören Holmberg, Bo Rothstein, Natalia Alvarado Pachon and Richard Svensson. 2019. The Quality of Government Standard Dataset, version Jan19. University of Gothenburg: The Quality of Government Institute. http://www.qog.pol.gu.se doi:10.18157/qogstdjan19 </li> <li> Teorell, Jan and Sundström, Aksel and Holmberg, Sören and Rothstein, Bo and Alvarado Pachon, Natalia and Dalli, Cem Mert and Lopez Valvarde, Rafael and Nilsson, Paula (2024). The Quality of Government Standard Dataset, version Jan24. University of Gothenburg: The Quality of Government Institute, Available at: https://www.gu.se/en/quality-government/qog-data/data-downloads/standard-dataset</li> <li>World Bank. (2023). World development indicators. The World Bank Washington DC. https://databank.worldbank.org/source/world-development-indicators</li> </ul>

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Edit IndicatorForm: GINI index (World Bank estimate)

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