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Identifying the Community Structure of the International-Trade Multi Network

Matteo Barigozzi, Giorgio Fagiolo and Giuseppe Mangioni

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

Abstract: We study the community structure of the multi-network of commodity-specific trade relations among world countries over the 1992-2003 period. We compare structures across commodities and time by means of the normalized mutual information index (NMI). We also compare them with exogenous community structures induced by geographical distances and regional trade agreements. We find that commodity-specific community structures are very heterogeneous and much more fragmented than that characterizing the aggregate ITN. This shows that the aggregate properties of the ITN may result (and be very different) from the aggregation of very diverse commodity-specific layers of the multi network. We also show that commodity-specific community structures, especially those related to the chemical sector, are becoming more and more similar to the aggregate one. Finally, our findings suggest that geographical distance is much more correlated with the observed community structure than RTAs. This result strengthens previous findings from the empirical literature on trade.

Keywords: Networks; Community structure; International-trade multi-network; Normalized mutual information (search for similar items in EconPapers)
JEL-codes: D85 F10 (search for similar items in EconPapers)
Date: 2010-09-15
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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Journal Article: Identifying the community structure of the international-trade multi-network (2011) Downloads
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