The Value of Symmetric and Asymmetric Indices of Segregation Constructed from MCD Data

People studying rural communities typically limit their analyses to single communities or to comparatively large units, such as counties. This information is important, but it is in local subcounty areas where rural people live and work. We examine the appropriateness of minor civil divisions (MCD's) as a small ecological unit in nonmetropolitan areas to measure segregation between poor and nonpoor people. The index of dissimilarity (D) and P*-type contiguity indices are evaluated for the nonmetro portions of Mississippi and Wisconsin. MCD's are different in the two states, which affects the interpretation of the indices. We found that segregation, as measured by D, was low in both states. The low value of D in Mississippi may have resulted from how the state's MCD's were delineated. Although the P* indices are highly correlated with the poverty rate, they do provide more information than the poverty rate alone.