论文标题
基于通讯距离的世界贸易网络中的社区结构
Community structure in the World Trade Network based on communicability distances
论文作者
论文摘要
在本文中，我们研究了世界贸易网络的中尺度结构。在这个框架中，国家之间的短期和远距离互动以及距离之间的距离，在这个框架中采用了特定的角色。因此，我们通过一种新的程序来确定集群，该过程利用Estrada的通讯距离和振动通信距离，事实证明这特别适合捕获经济网络的内部结构。所提出的方法旨在找到最大化特定模块化函数的距离阈值，该函数定义为通用度量空间。主要优点考虑了该过程的计算效率以及检查所得社区的集群间和群内特性的可能性。数值分析强调了国家之间特殊的关系，并提供了一组丰富的信息，这些信息几乎无法在替代的聚类方法中实现。
In this paper, we investigate the mesoscale structure of the World Trade Network. In this framework, a specific role is assumed by short and long-range interactions, and hence by the distance, between countries. Therefore, we identify clusters through a new procedure that exploits Estrada communicability distance and the vibrational communicability distance, which turn out to be particularly suitable for catching the inner structure of the economic network. The proposed methodology aims at finding the distance threshold that maximizes a specific modularity function defined for general metric spaces. Main advantages regard the computational efficiency of the procedure as well as the possibility to inspect intercluster and intracluster properties of the resulting communities. The numerical analysis highlights peculiar relationships between countries and provides a rich set of information that can hardly be achieved within alternative clustering approaches.
