Change of racial/ethnic composition over time
Description
For several decades, Cambridge has become increasingly racially and ethnically diverse. However, growth in the proportion of people of color in Cambridge has slowed in recent years, and the proportional size of the Black community shows indications of decreasing. This indicator measures diversity in the City's population using a statistic commonly used in ecology for measuring biodiversity, the Gini-Simpson Index. As used here, the Gini-Simpson Index is the probability that any two Cambridge residents selected at random will be members of two comparison groups.
In the chart, the three lines show the Gini-Simpson Index value for three sets of comparison groups:
- Black people and all others
- Any two different racial groups from the four categories of Asian, Black, White, and all others
- Non-Hispanic White people and all others.
Data Source
ACS 1-Year Table DP05, except for Decennial Census years, in which case data comes from table P9.
Methodology
Gini-Simpson Index
Data Series