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Introducing a spatially explicit Gini measure for spatial segregation

Author

Listed:
  • Umut Türk

    (Abdullah Gül University)

  • John Östh

    (Oslo Metropolitan University)

Abstract

This paper proposes an alternative measure of economic segregation by income that utilizes the Gini index as the basis of measurement. The Gini Index of Spatial Segregation (GSS) is a ratio of two Gini indices that compares the inequality between neighbourhoods to the inequality between individuals at the macro-level where neighbourhoods are nested. Unlike earlier measures of segregation found in the literature, the GSS uses individualized neighbourhoods, which can be defined as an area constituted within a radius or as a population count method around an individual geo-location, depending on the population density and proximity among individuals in the study area. The GSS can measure residential segregation by any continuous variable for both radii and k-nearest neighbours (knn with and without a decay factor) approaches to bespoke neighbourhoods. Therefore, it is sensitive to the spatial configuration of the area, easy to compute and interpret, and suitable for comparative studies of segregation over time and across different contexts. An empirical application of the index is illustrated using data from Sweden that covers the entire population for 1994, 2004, and 2014. We demonstrate how the definition and scale of the neighbourhood influence the measures of economic segregation. Overall, the GSS offers a flexible and robust framework for measuring segregation that can be used to inform policy decisions and research on inequality.

Suggested Citation

  • Umut Türk & John Östh, 2023. "Introducing a spatially explicit Gini measure for spatial segregation," Journal of Geographical Systems, Springer, vol. 25(4), pages 469-488, October.
    • Handle: RePEc:kap:jgeosy:v:25:y:2023:i:4:d:10.1007_s10109-023-00412-1
    DOI: 10.1007/s10109-023-00412-1
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    References listed on IDEAS

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    More about this item

    Keywords

    Segregation; Gini index; Sweden; Bespoke neighbourhoods;
    All these keywords.

    JEL classification:

    • R10 - Urban, Rural, Regional, Real Estate, and Transportation Economics - - General Regional Economics - - - General
    • R23 - Urban, Rural, Regional, Real Estate, and Transportation Economics - - Household Analysis - - - Regional Migration; Regional Labor Markets; Population
    • R52 - Urban, Rural, Regional, Real Estate, and Transportation Economics - - Regional Government Analysis - - - Land Use and Other Regulations
    • D63 - Microeconomics - - Welfare Economics - - - Equity, Justice, Inequality, and Other Normative Criteria and Measurement

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