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Multiscale core-periphery structure in a global liner shipping network.

Sadamori Kojaku1,2, Mengqiao Xu3, Haoxiang Xia3

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Global maritime shipping networks exhibit a core-periphery structure, with most ports acting as central hubs. This finding impacts understanding transportation system robustness and efficiency.

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Area of Science:

  • Network science
  • Maritime logistics
  • Transportation systems analysis

Background:

  • Maritime transport is crucial for global trade, with container ships dominating value.
  • Understanding the structure of global liner shipping networks is essential for logistics and economics.

Purpose of the Study:

  • To analyze the global liner shipping network as a port network.
  • To identify and characterize the core-periphery structure within this network.
  • To develop a method for detecting core-periphery pairs in projected bipartite networks.

Main Methods:

  • Constructing a port network via one-mode projection of a bipartite network (ports and ship routes).
  • Developing and applying a novel algorithm to detect core-periphery pairs at various scales.
  • Utilizing a configuration model accounting for the projection method.

Main Results:

  • The global liner shipping network displays a distinct core-periphery structure.
  • Most analyzed ports function as core nodes rather than peripheral ones.
  • A global core-periphery structure was identified across Europe, America, and Asia, though not universally.

Conclusions:

  • The core-periphery structure is a key characteristic of global maritime transport networks.
  • Identifying core and peripheral ports aids in understanding network efficiency and resilience.
  • Uneven development is evident, with specific regions forming a global core.