Identifying the community structure of the international-trade multi-network
Identifying the community structure of the international-trade multi-network
复制标题
DOI：
10.1016/j.physa.2011.02.004
复制
发表时间：
2011-06-01
影响因子：
3.3
通讯作者：
Mangioni, Giuseppe
中科院分区：
文献类型：
--
作者：
Barigozzi, Matteo;Fagiolo, Giorgio;Mangioni, Giuseppe
本文研究了1992-2003年间世界各国商品贸易关系多网络的共同体结构。我们通过标准化互信息指数（NMI）比较了不同商品和时间的结构。我们还将它们与地理和区域贸易协定引起的外生社区结构进行了比较。我们发现，特定商品的社区结构非常异质，比总体ITN的特征更加分散。这表明，ITN的聚集特性可能是由多网络中非常不同的特定商品层的聚集而产生的（并且非常不同）。我们还表明，特定商品的社区结构，特别是与化学部门有关的社区结构，正变得越来越类似于综合社区结构。最后，我们的研究结果表明，与区域贸易协定引起的划分相比，地理因素导致的国家划分与观察到的社区结构的相关性要大得多。这一结果加强了以往贸易实证文献的研究结果。(C) 2011 Elsevier B.V.版权所有
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 geography 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 geography-induced partitions of our set of countries are much more correlated with observed community structures than partitions induced by regional-trade agreements. This result strengthens previous findings from the empirical literature on trade. (C) 2011 Elsevier B.V. All rights reserved.