全球稀土贸易网络结构特征及路径演变

Structural Characteristics and Path Evolution of Global Rare Earth Trade Network

基于1992-2018年全球稀土贸易数据,利用社会网络分析等方法研究稀土贸易网络空间结构特征和关联路径演变。结果表明:1)在稀土贸易网络结构特征方面,虽然各国稀土贸易规模持续增长,但绝大多数国家属于稀土贸易进口型,全球稀土贸易供需矛盾尖锐,稀土网络点度数稳步增长,空间分布均衡;上游稀土贸易网络由双核转为多核,中游网络由单核向四核演变,下游网络由三核转为单核,稀土贸易由低端原矿逐步向高附加值产品转变。2)稀土贸易空间关联结构大致经历了“双核两圈”和“多核三圈”阶段,网络空间关联廊道由“一”字形演变为“X”形。研究结论有助于了解全球稀土贸易网络结构特征及路径演变,可为中国稀土贸易政策制定提供参考。

Based on the global rare earth trade data from 1992 to 2018,the spatial structure characteristics and correlation path evolution of rare earth trade network were studied using social network analysis and other methods.The results show that:in terms of the structure characteristics of the global rare earth trade network,although the scale of rare earth trade continues to grow,the vast majority of countries are rare earth trade importing countries,and the contradiction between supply and demand of global rare earth trade is acute.The node degree of rare earth trade network is increasing steadily and its spatial distribution is more balanced.The upstream rare earth trade network has changed from dual-core to multi-core,the middle rare earth trade network has changed from single-core to four-core,and the downstream rare earth trade network has changed from three-core to single-core.Rare earth trade has gradually shifted from low-end raw ore to high value-added products.From the perspective of evolution of the spatial correlation structure of rare earth trade,it has roughly experienced two stages of"dual-core and two-circle"and"multi-core and three-circle".The corridor of cyberspace has evolved from the shape of"一"to"X".The research conclusions are helpful to understand the structural characteristics and path evolution of global rare earth trade network,and provide reference for China′s rare earth trade policy making.