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Randomizing world trade. II. A weighted network analysis

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  • Tiziano Squartini
  • Giorgio Fagiolo
  • Diego Garlaschelli

Abstract

Based on the misleading expectation that weighted network properties always offer a more complete description than purely topological ones, current economic models of the International Trade Network (ITN) generally aim at explaining local weighted properties, not local binary ones. Here we complement our analysis of the binary projections of the ITN by considering its weighted representations. We show that, unlike the binary case, all possible weighted representations of the ITN (directed/undirected, aggregated/disaggregated) cannot be traced back to local country-specific properties, which are therefore of limited informativeness. Our two papers show that traditional macroeconomic approaches systematically fail to capture the key properties of the ITN. In the binary case, they do not focus on the degree sequence and hence cannot characterize or replicate higher-order properties. In the weighted case, they generally focus on the strength sequence, but the knowledge of the latter is not enough in order to understand or reproduce indirect effects.

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File URL: http://arxiv.org/pdf/1103.1249
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Bibliographic Info

Paper provided by arXiv.org in its series Papers with number 1103.1249.

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Date of creation: Mar 2011
Date of revision: Nov 2011
Publication status: Published in Phys. Rev. E 84, 046118 (2011)
Handle: RePEc:arx:papers:1103.1249

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Web page: http://arxiv.org/

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Cited by:
  1. Marco Duenas & Giorgio Fagiolo, 2011. "Modeling the International-Trade Network: A Gravity Approach," Papers 1112.2867, arXiv.org.
  2. Marco Dueñas & Giorgio Fagiolo, 2014. "Global Trade Imbalances: A Network Approach," Advances in Complex Systems (ACS), World Scientific Publishing Co. Pte. Ltd., World Scientific Publishing Co. Pte. Ltd., vol. 17(03), pages 1450014-1-1.

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