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The Topography of Metropolitan Employment: Identify Centers of Employment in a Polycentric Urban Area

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  • Christian L. Redfearn

Abstract

Increasingly, U.S. metropolitan areas are polycentric. While this is well recognized, there is lit-tle consensus as to the appropriate method for identifying centers of employment and their extent.Discussions of sprawl and decentralization, agglomeration and productivity, and the impacts oftransportation or land-use regulation on urban structure depend crucially on the spatial account-ing of employment within a metropolitan area. Existing methods for subcenter identi¯cation su®erfrom strong assumptions about parametric form, misspeci¯cation, or reliance on local knowledge tocalibrate model parameters. Using data from the greater Los Angeles metropolitan area, this paperintroduces a nonparametric method for identifying subcenters { both their centroids and bound-aries. This method is benchmarked against representative alternatives for subcenter identi¯cation.The importance of the di®erence in approaches is made clear by comparing their measured con-centration of the greater Los Angeles metropolitan area. Results indicate that this, more °exible,nonparametric approach yields both greater accuracy in de¯ning subcenter boundaries and betterresolution identifying a wide range of subcenters. These attributes should better inform researchthat employs density as an independent or dependent variable.

Suggested Citation

  • Christian L. Redfearn, 2005. "The Topography of Metropolitan Employment: Identify Centers of Employment in a Polycentric Urban Area," Working Paper 8588, USC Lusk Center for Real Estate.
    • Handle: RePEc:luk:wpaper:8588
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    References listed on IDEAS

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