השוואת שיטות

	Isolation Index	Gini Coefficient
תחום	Sociology	Sociology
משפחה	Process / pipeline	Process / pipeline
שנת המקור	1954	1912
הוגה השיטה	Wendell Bell (formalization of P* indices)	Corrado Gini
סוג	Exposure-dimension segregation index	Scalar measure of statistical dispersion / inequality
מקור מכונן	Bell, W. (1954). A probability model for the measurement of ecological segregation. Social Forces, 32(4), 357–364.	Ceriani, L., & Verme, P. (2012). The origins of the Gini index: extracts from Variabilità e Mutabilità (1912) by Corrado Gini. The Journal of Economic Inequality, 10(3), 421–443.
כינויים	P* isolation index, interaction index, exposure index, Bell isolation index	Gini index, Gini ratio, Gini concentration ratio, G
קשורות	5	5
תקציר	The isolation index measures the exposure dimension of segregation: the extent to which members of a minority group are exposed only to one another rather than to members of other groups. It answers the question 'what is the own-group share of the typical neighbor (or classmate, or coworker) that a member of the focal group encounters?' Unlike evenness measures, it depends on the relative size of the group as well as its spatial distribution.	The Gini coefficient is the most widely used single-number summary of inequality in a distribution such as income or wealth. Introduced by the Italian statistician Corrado Gini in 1912, it equals twice the area between the Lorenz curve and the line of perfect equality, ranging from 0 when everyone has the same amount to a maximum approaching 1 when one unit holds everything.