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Urban supply chain complexity impacts disruptions. Increased supplier diversity, particularly for sophisticated products, can buffer cities against supply chain shocks, aiding risk management.

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Area of Science:

  • Urban planning
  • Network science
  • Economic geography

Background:

  • Supply chain complexity is often linked to increased vulnerability to supply disruptions in cities.
  • Understanding the structure of urban supply networks is crucial for assessing resilience.

Purpose of the Study:

  • To quantify urban supply chain complexity using network measures.
  • To investigate the relationship between supply chain architecture and a city's resistance to supply disruptions.

Main Methods:

  • Calculated horizontal (supplier diversity) and vertical (supplier strength) complexity.
  • Analyzed over 1 million annual supply flows to 69 U.S. cities (2012-2015).
  • Examined trade-offs between horizontal and vertical complexity in urban supply networks.

Main Results:

  • A trade-off pattern between horizontal and vertical complexity characterizes urban supply networks.
  • Increased horizontal complexity (supplier diversity) for technologically sophisticated products correlates with less intense supply chain shocks.
  • Supplier diversity may act as a buffer against urban supply chain shocks.

Conclusions:

  • Urban supply network architecture significantly influences resilience to shocks.
  • Increasing supplier diversity for complex products can enhance a city's ability to withstand supply chain disruptions.
  • Findings offer insights for cities to anticipate and manage supply chain risks.