Source: U.S. Bureau of the Census
Release: Racial Dissimilarity Index
The Racial Dissimilarity Index measures the percentage of the non-hispanic white population in a county which would have to change Census tracts to equalize the racial distribution between white and non-white population groups across all tracts in the county.
Starting with the 2016 observations, the calculation has been changed so that counties with only one census tract have missing data. Zero values represent counties where the proportions of non-white population and non-hispanic white population are the same.
U.S. Bureau of the Census, White to Non-White Racial Dissimilarity Index for Santa Barbara County, CA [RACEDISPARITY006083], retrieved from FRED, Federal Reserve Bank of St. Louis; https://fred.stlouisfed.org/series/RACEDISPARITY006083, October 16, 2018.