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Measuring Spatial Concentration: The Use of Threshold Profiles

Author

Listed:
  • Ron Johnston

    (School of Geographical Sciences, University of Bristol, Bristol BS8 1SS, England)

  • David Voas

    (Department of Sociological Studies, University of Sheffield, Sheffield S10 2TU, England Michael Poulsen Department of Human Geography, Macquarie University, Sydney, NSW 2109, Australia)

Abstract

The measurement of spatial pattern is often undertaken using one of a number of single-number indices, such as the Gini coefficient, which may not illuminate certain aspects of the pattern involved—especially the degree to which the members of the reference group are spatially concentrated. We suggest an alternative approach based on a concentration profile which shows the degree to which a group is spatially concentrated according to a range of thresholds. This is illustrated with data on male unemployment in England and Wales in 1991, which also shows the importance of spatial scale to the study of concentrations and, potentially, to the formulation of spatially focused public policies.

Suggested Citation

  • Ron Johnston & David Voas, 2003. "Measuring Spatial Concentration: The Use of Threshold Profiles," Environment and Planning B, , vol. 30(1), pages 3-14, February.
    • Handle: RePEc:sae:envirb:v:30:y:2003:i:1:p:3-14
    DOI: 10.1068/b12935
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    References listed on IDEAS

    as
    1. Michael Poulsen & Ron Johnson & James Forrest, 2002. "Plural Cities and Ethnic Enclaves: Introducing a Measurement Procedure for Comparative Study," International Journal of Urban and Regional Research, Wiley Blackwell, vol. 26(2), pages 229-243, June.
    2. Douglas Massey & Nancy Denton, 1989. "Hypersegregation in U.S. Metropolitan Areas: Black and Hispanic Segregation Along Five Dimensions," Demography, Springer;Population Association of America (PAA), vol. 26(3), pages 373-391, August.
    3. Andrew McCulloch, 2001. "Ward-Level Deprivation and Individual Social and Economic Outcomes in the British Household Panel Study," Environment and Planning A, , vol. 33(4), pages 667-684, April.
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    Cited by:

    1. Olga Alonso-Villar & Coral Del R�o, 2008. "Geographical Concentration of Unemployment: A Male-Female Comparison in Spain," Regional Studies, Taylor & Francis Journals, vol. 42(3), pages 401-412, April.
    2. Kelvyn Jones & Ron Johnston & David Manley & Dewi Owen & Chris Charlton, 2015. "Ethnic Residential Segregation: A Multilevel, Multigroup, Multiscale Approach Exemplified by London in 2011," Demography, Springer;Population Association of America (PAA), vol. 52(6), pages 1995-2019, December.
    3. Jan Ritsema van Eck & Eric Koomen, 2008. "Characterising urban concentration and land-use diversity in simulations of future land use," The Annals of Regional Science, Springer;Western Regional Science Association, vol. 42(1), pages 123-140, March.

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