“…The lack of detailed information on the patterns and trends in segregation at a range of geographic scales is due to the fact that most existing studies rely primarily on aspatial measures of segregation—measures that were developed prior to the availability of geographical information system (GIS) software and that consequently do not fully account for spatial distributions of race and poverty (for discussion and exceptions, see Dawkins, 2006; Grannis, 2002; Reardon & O'Sullivan, 2004; White, 1983; Wong, 1997, 1999, 2004). Reliance on aspatial measures has two principal drawbacks: first, it ignores the proximity of census tracts to one another; and second, it results in segregation measures that are sensitive only to segregation at the (arbitrary) geographic scale of census tracts (or blocks, etc).…”