
05840930
j
2011b.00846
Farris, Frank A.
The Gini index and measures of inequality.
Am. Math. Mon. 117, No. 10, 851864 (2010).
2010
Mathematical Association of America (MAA), Washington, DC
EN
K40
M40
M70
mathematical applications
descriptive statistics
statistical measures
economics
social sciences
doi:10.4169/000298910X523344
Summary: The Gini index is a summary statistic that measures how equitably a resource is distributed in a population; income is a primary example. In addition to a selfcontained presentation of the Gini index, we give two equivalent ways to interpret this summary statistic: first in terms of the percentile level of the person who earns the average dollar, and second in terms of how the lower of two randomly chosen incomes compares, on average, to mean income.