Residential ethnic segregation for age cohorts in England and Wales, Centre for Census and Survey Research (CCSR) BURISA/UPTAP joint workshop City Hall, London, 26 September 2008 Understanding Population Trends and Processes
Background Extensive literature on segregation, also in relationship with employment, education, … (Burgess, 1928; Massey and Denton, 1988; Danzinger and Holzer, 2000; Orfield, 2001; Bullard, 1983;...) Also segregation and the demographic processes following immigration (Peach, 1996; Finney and Simpson, 2008; Domingo and Bayona, 2007) Residential segregation across life-stages?
Objective Analyse the change in ethnic residential segregation across life-stages (represented by age cohorts)
Research questions 1.Is segregation greater at some life-stages than at other? 2.Does the life-pattern of segregation differ between ethnic groups?
A common measure Index of Dissimilarity (ID) (an uneven geographical spread) 0 Low 100 High
Complete mid-91 and mid-01 population estimates for small areas, including adjustments for: 1.Population definition (1991 students at term-time) 2.Non-response not included in census output 3.Consistent individual ages (for all ethnic groups) 4.Harmonisation of geographical units Data
Segregation by age cohorts England and Wales (across wards)
Change in segregation (ID): 0-6 in 1991 and ten years later London Boroughs (across wards) Black CaribbeanBlack African Waltham Forest: 18.3 (1991) to 19.9 (2001) Islington: 10.0 (1991) to 12.2 (2001) Newham: 14.6 (1991) to 18.7 (2001) Lewisham: 12.2 (1991) to 15.0 (2001) Sutton: 20.9 (1991) to 24.7 (2001) Croydon: 36.3 (1991) to 37.6 (2001)
Segregation by age cohorts
Phase 1 Phase 2Phase 3 Change in segregation (ID) across life-stages, England and Wales (across wards)
Change in segregation (ID) across life-stages, England and Wales (across districts)
-Results can be affected by differential mortality and international migration (perhaps the latter much more important) -Such effects can be particularly hard to disentagle in local areas (with people moving in or out of the area) Limitations
-Useful to highlight that segregation is generally greater during the middle adulthood phase -Useful to observe how the life-pattern of segregation does not differ significantly between ethnic groups Advantages
The use of segregation measures (eg Index of Dissimilarity) with an age cohort dimension can be used as a new window to look at residential patterns of ethnic segregation The approach can be further refined and used in a wider context: -Settlement and distribution patterns of different groups over time/space -Population movement at different life-stages, age migration schedules -... Conclusions
Data Project More information