GEOGRAPHY & CARTOGRAPHY CALCULATOR
Ratesegregation Index
A precise tool.
What is the Ratesegregation Index & How does it work?
The dissimilarity index quantifies how evenly two population groups are distributed across geographic sub‑units such as census tracts. A value of 0 indicates perfect integration, while a value of 1 denotes complete segregation.
Mathematically, the index is derived from the absolute differences between the proportion of each group in every sub‑unit and the overall proportion of that group in the entire area.
The index is widely used in urban studies, public health, and policy analysis to assess residential segregation and its social implications.
D = \frac{1}{2} \sum_{i=1}^{n} \left| \frac{a_{i}}{A} – \frac{b_{i}}{B} \right|
ai = minority population in tract i, A = total minority, bi = majority population in tract i, B = total majority
Parameters
Result
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Frequently Asked Questions
What is the Ratesegregation Index?
The Ratesegregation Index quantifies how evenly two population groups are distributed across geographic sub-units, with a value of 0 indicating perfect integration and a value of 1 denoting complete segregation.
How is the Ratesegregation Index calculated?
The index is derived from the absolute differences between the proportion of each group in every sub-unit and the overall proportion of that group in the entire area.
What does a value of 0 on the Ratesegregation Index represent?
A value of 0 indicates perfect integration, meaning the two population groups are evenly distributed across all geographic sub-units.
What does a value of 1 on the Ratesegregation Index represent?
A value of 1 denotes complete segregation, indicating that each group is concentrated entirely in separate geographic sub-units.
Where is the Ratesegregation Index commonly used?
The index is widely used in urban studies, public health, and policy analysis to assess residential segregation patterns.
Can the Ratesegregation Index be applied to more than two population groups?
No, the Ratesegregation Index is specifically designed for comparing two population groups. For more than two groups, other indices like the Dissimilarity Index or the Isolation Index may be used.
What are some limitations of using the Ratesegregation Index?
The index does not account for the socioeconomic status or other characteristics of the population groups, and it assumes that all geographic sub-units are of equal size and importance.
Results are for informational purposes only and do not constitute professional advice.