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When Are Impedance Choices Irrelevant?

Author

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  • David Levinson

    (TransportLab, School of Civil Engineering, University of Sydney)

Abstract

Access indices often differ only by the impedance function f that downweights opportunities by travel cost. We give conditions under which different impedances (i) yield the same percentage responses in a standard planar benchmark, (ii) give levels that differ only by a multiplicative constant, and (iii) preserve cross-place rankings. We work fully in discrete form, so results apply to finite opportunity sets without measure notation.

Suggested Citation

  • David Levinson, 2026. "When Are Impedance Choices Irrelevant?," Working Papers paper-2026-07, University of Minnesota: Nexus Research Group.
    • Handle: RePEc:nex:wpaper:paper-2026-07
    DOI: 10.32866/001c.145805
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    File URL: https://doi.org/10.32866/001c.145805
    File Function: Published version landing page, 2026
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    JEL classification:

    • R40 - Urban, Rural, Regional, Real Estate, and Transportation Economics - - Transportation Economics - - - General

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