The separation of a large population into subgroups—based on grounds of income, race, religion, or language—located in distinct residential areas. Ellis et al. (2004) AAAG 94, 3 write on prejudice and racial segregation, while Blumen and Zamir (2001) Env. & Plan. A 33 find spatial segregation to be intrinsic to the capitalism-patriarchy. In a similar vein, Smith (2012) TIBG 37, 3, 461 outlines ways in which distinct sub-populations of British society are becoming more transient and segregated. His work is on British coastal towns, but his conclusions apply throughout the UK. Schnell and Yoav (2001) AAAG 91, 4 suggest a socio-spatial isolation index of segregation. Goldhaber (2007) Urb. Geog. 28, 6 presents an empirical model for testing ethnic segregation in the context of spatial perception.