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Structure of international trade hypergraphs

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  • Sudo Yi
  • Deok-Sun Lee

Abstract

We study the structure of the international trade hypergraph consisting of triangular hyperedges representing the exporter-importer-product relationship. Measuring the mean hyperdegree of the adjacent vertices, we first find its behaviors different from those in the pairwise networks and explain the origin by tracing the relation between the hyperdegree and the pairwise degree. To interpret the observed hyperdegree correlation properties in the context of trade strategies, we decompose the correlation into two components by identifying one with the background correlation remnant even in the exponential random hypergraphs preserving the given empirical hyperdegree sequence. The other component characterizes the net correlation and reveals the bias of the exporters of low hyperdegree towards the importers of high hyperdegree and the products of low hyperdegree, which information is not readily accessible in the pairwise networks. Our study demonstrates the power of the hypergraph approach in the study of real-world complex systems and offers a theoretical framework.

Suggested Citation

  • Sudo Yi & Deok-Sun Lee, 2022. "Structure of international trade hypergraphs," Papers 2203.05762, arXiv.org, revised Oct 2022.
    • Handle: RePEc:arx:papers:2203.05762
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