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Randomizing world trade. II. A weighted network analysis

Squartini, Tiziano and Fagiolo, Giorgio and Garlaschelli, Diego Randomizing world trade. II. A weighted network analysis. Physical Review E, 84. 046118. ISSN 1539-3755 (2011)

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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 and undirected, aggregated and 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.

Item Type: Article
Identification Number: 10.1103/PhysRevE.84.046118
Subjects: Q Science > QA Mathematics
Q Science > QC Physics
Research Area: Economics and Institutional Change
Depositing User: Caterina Tangheroni
Date Deposited: 05 Nov 2015 11:16
Last Modified: 05 Nov 2015 15:27
URI: http://eprints.imtlucca.it/id/eprint/2813

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