Atyabi Farzaneh, Buchel Olha, Hedayatifar Leila
Department of Physics, North Tehran Branch, Islamic Azad University, Tehran 1477893855, Iran.
New England Complex Systems Institute, 277 Broadway, Cambridge, MA 02139, USA.
Entropy (Basel). 2020 Jul 23;22(8):810. doi: 10.3390/e22080810.
We analyze the network of cross-border bank lending connections among countries from 1977 to 2018. The network includes core countries that lend money and peripheral countries that borrow money from core countries. In nowadays highly connected banking network, financial crisis that start from a country can spread to other countries very fast and cause global affects. We use principal component analysis (PCA) to find the influential lending (core) countries in this network over the years and clusters of borrowing (peripheral) countries related to these impactful core countries. We find three clusters of peripheral countries, with some constant and some changing members over time. This can be a sign of changes in the financial or political interactions among countries. The changes in the role of core countries and how these roles get affected by the important financial crisis in the past decades is investigated. Among 31 of core countries, 7 countries have a partially or constantly important role in the network including France, United Kingdom, United States, Japan, Germany, Chinese Taipei and Switzerland.
我们分析了1977年至2018年各国之间跨境银行贷款联系网络。该网络包括放贷的核心国家和从核心国家借款的外围国家。在当今高度互联的银行网络中，始于一个国家的金融危机能够非常迅速地蔓延到其他国家并造成全球影响。我们使用主成分分析（PCA）来找出这些年来该网络中有影响力的放贷（核心）国家以及与这些有影响力的核心国家相关的借款（外围）国家集群。我们发现了三类外围国家集群，其成员有些随时间保持不变，有些则发生变化。这可能是国家间金融或政治互动发生变化的一个迹象。我们研究了核心国家角色的变化以及这些角色在过去几十年中如何受到重大金融危机的影响。在31个核心国家中，有7个国家在该网络中具有部分或持续重要的作用，包括法国、英国、美国、日本、德国、中国台北和瑞士。
