全球金属矿产贸易动态演化与异质性研究:基于SAOM模型的分析

    Dynamic evolution and heterogeneity of global metal mineral trade: an analysis based on the SAOM model

    • 摘要: 在全球产业链重构、能源转型加速和资源安全风险上升的背景下,金属矿产跨国流动呈现出显著的网络化和动态调整特征。为揭示全球金属矿产贸易关系的演化机制,本文基于2010—2024年全球101个国家的金属矿产双边贸易数据,构建多期有向贸易网络,并采用随机行动者导向模型(SAOM)识别贸易联系生成、延续与调整的驱动因素。研究发现:第一,全球金属矿产贸易网络具有明显的结构选择性,密度效应显著为负而互惠性显著为正,说明贸易联系并非随机扩张,国家间双向贸易关系具有较强延续倾向。第二,以PageRank中心度表征的贸易网络地位,其发送者效应和接收者效应均显著为正,表明处于全球贸易网络核心位置的国家更容易拓展出口联系并吸引进口联系。第三,贸易网络地位相似性显著为负,说明金属矿产贸易关系更倾向于在不同层级国家之间形成,体现出核心国家与边缘资源国或半边缘资源国之间的互补连接特征。第四,拓展性机制检验表明,技术创新能力和跨区域市场搜寻能力是贸易网络地位影响金属矿产贸易联系拓展的重要渠道。第五,分矿种、国际合作网络和发展阶段的异质性检验表明,不同金属矿产的贸易关系演化机制存在差异,国际合作网络和国家发展阶段会进一步影响贸易联系的形成方向与强度。本文从动态网络视角拓展了全球金属矿产贸易网络研究,也为优化矿产资源国际合作布局、提升贸易体系稳定性和实施差异化矿产资源安全策略提供了经验证据。

       

      Abstract: Against the background of global industrial chain restructuring, accelerating energy transition and rising resource security risks, cross-border flows of metal minerals have become increasingly networked and dynamic. Based on bilateral trade data for 101 countries from 2010 to 2024, this study constructs multi-period directed trade networks and applies a Stochastic Actor-Oriented Model(SAOM) to identify the drivers of the formation, persistence and adjustment of metal mineral trade ties. The results show that the global metal mineral trade network is characterized by structural selectivity: the density effect is significantly negative, while the reciprocity effect is significantly positive. Trade network status has positive sender and receiver effects, indicating that countries in core positions are more likely to expand export ties and attract import ties. The negative status similarity effect suggests that trade relations tend to form between countries at different network levels, reflecting complementary links between core countries and peripheral or semi-peripheral countries. Additional mechanism tests indicate that technological innovation and cross-regional market search capability are important channels through which trade network status promotes the expansion of metal mineral trade ties. Heterogeneity tests by mineral category, international cooperation network and development stage further reveal that the evolution mechanisms of trade relations differ across minerals, cooperation networks and country groups. This study extends research on global metal mineral trade networks from a dynamic network perspective and provides empirical evidence for optimizing international cooperation and differentiated resource security strategies.

       

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