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Global value trees.

Zhen Zhu1, Michelangelo Puliga2, Federica Cerina3

  • 1IMT Institute for Advanced Studies Lucca, Lucca, Italy.

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|May 16, 2015
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Summary
This summary is machine-generated.

Global value chains (GVCs) are not linear chains but resemble trees. This study introduces global value trees (GVTs) to analyze the structure of international production networks and industry importance.

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Area of Science:

  • Economics
  • Network Science
  • International Trade

Background:

  • Globalization has led to production fragmentation, often termed global value chains (GVCs).
  • Existing research on GVCs primarily focuses on their global reach rather than their structural characteristics.
  • Understanding the topology of GVCs is crucial for analyzing the global production system.

Purpose of the Study:

  • To investigate the structural topology of industry-level global value chains (GVCs).
  • To introduce and compute global value trees (GVTs) as a novel representation of GVCs.
  • To develop and assess an industry importance measure based on GVTs.

Main Methods:

  • Utilizing the World Input-Output Database (WIOD) to analyze the evolution of the global production system.
  • Applying complex network analysis to model industry-level GVCs.
  • Computing global value trees (GVTs) and comparing network centrality measures.

Main Results:

  • Industry-level GVCs exhibit a tree topology, deviating from a simple chain structure.
  • Global value trees (GVTs) provide a more accurate representation of production fragmentation.
  • A novel industry importance measure derived from GVTs shows distinct characteristics compared to traditional centrality measures.

Conclusions:

  • The structure of global value chains is better characterized as trees rather than linear chains.
  • Global value trees (GVTs) offer a new framework for analyzing international production networks.
  • The developed industry importance measure has potential for future applications in economic analysis.