摘要
国际贸易网络是典型的复杂经济网络,拓扑结构和权重结构都具有异质性的特征.提出了网络强度熵和网络权重熵.对国际贸易网络权重结构的异质性进行测度.实证结果表明1950年至2000年间国际贸易网络拓扑结构和权重结构的异质性呈现出相反的演化方向,拓扑结构的异质性下降而权重结构的异质性上升.这说明虽然更多的国家之间开展直接的贸易关系,但国际贸易网络中贸易量和贸易流量的分布趋于更不均衡的状态.研究结果表明,对网络权重结构的分析可以揭示更为全面的系统演化特征和机制.
World trade network is a typical complex economic network, both its topological and weighted structure are heterogeneous. To quantitatively characterize the heterogeneity of its weighted structure, network strength entropy and network weight entropy are proposed. Computing results of 1950 - 2000 trade data show that the heterogeneity of world trade network＇ topological structure decreases and heterogeneity of its weighted structure increases. It shows that though more and more countries trade directly, the distributions of trade volume and flow volume are more unbalanced. This study shows that analysis of network weighted structure can provide more comprehensive information on system evolution.
出处
《佳木斯大学学报（自然科学版）》
CAS
2007年第4期575-578,共4页
Journal of Jiamusi University：Natural Science Edition
