The Multi-Network of International Trade: A Commodity-Specific Analysis

Matteo Barigozzi, Giorgio Fagiolo () and Diego Garlaschelli

LEM Papers Series from Laboratory of Economics and Management (LEM), Sant'Anna School of Advanced Studies, Pisa, Italy

Abstract: We study the topological properties of the multi-network of commodity-specific trade relations among world countries over the 1992-2003 period, comparing them with those of the aggregate-trade network, known in the literature as the international trade network (ITN). We show that link-weight distributions of commodity-specific networks are extremely heterogeneous and (quasi) log-normality of aggregate link-weight distribution is generated as a sheer outcome of aggregation. Commodity-specific networks also display average connectivity, clustering and centrality levels very different from their aggregate counterpart. We also find that ITN complete connectivity is mainly achieved through the presence of many weak links that keep commodity-specific networks together, and that the correlation structure existing between topological statistics within each single network is fairly robust and mimics that of the aggregate network. Finally, we employ cross-commodity correlations between link weights to build taxonomies of commodities. Our results suggest that on the top of a relatively time-invariant ''intrinsic'' taxonomy (based on inherent between-commodity similarities), the roles played by different commodities in the ITN have become more and more dissimilar, possibly as the result of an increased trade specialization.

Keywords: Weighted directed networks; International trade network; Multi-networks; Commodity-specific trade; Econophysics (search for similar items in EconPapers)
JEL-codes: D85 F10 (search for similar items in EconPapers)
Date: 2009-08-31
New Economics Papers: this item is included in nep-int and nep-net
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Citations: View citations in EconPapers (6)

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Related works:
Working Paper: Multinetwork of international trade: A commodity-specific analysis (2010)
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Persistent link: https://EconPapers.repec.org/RePEc:ssa:lemwps:2009/09

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