Spatial association of carbon emissions between countries has more to do with trade activities. This paper applies the social network analysis to give a clear picture on the evolutionary characteristics of carbon emissions network of Organization for Economic Co-operation and Development (OECD) countries and investigates the technology spillovers of environmental regulation on the carbon emissions network. Empirical results show that: First, the carbon emissions network of OECD countries presents a typical network structure with increasing network density, correlation and decreasing network efficiency. Second, carbon is mainly transferred among European countries along with the international trade, and the impact of countries on the edge of the network is still small. Finally, the U-shape relationship between environmental regulation and carbon emissions network is identified. The innovation inhibition effect exists when the environmental regulation is in a low level, and after arriving at the threshold value, the innovation compensation effect begins to appear. Our findings implied that when making policies for carbon emissions reduction, countries should strengthen the cross-regional communication and fully consider the spatial correlation effect. Some international organizations are supposed to play a leading role in reducing global carbon emissions by controlling the carbon transfer.

国家之间碳排放的空间关联更多地与贸易活动有关。本文运用社会网络分析方法，对经济合作与发展组织（OECD）国家的碳排放网络的演化特征进行了清晰的描述，并研究了环境监管对碳排放网络的技术溢出效应。实证结果表明：首先，经合组织国家的碳排放网络呈现出典型的网络结构，其网络密度增加，相关性降低，网络效率降低。其次，碳主要与国际贸易一起在欧洲国家之间转移，而且国家对网络边缘的影响仍然很小。最后，U确定了环境法规与碳排放网络之间的形状关系。当环境监管水平较低时，存在创新抑制效应，达到阈值后，创新补偿效应开始显现。我们的发现暗示，在制定减少碳排放的政策时，各国应加强跨地区的沟通，并充分考虑空间相关性的影响。一些国际组织应该通过控制碳转移在减少全球碳排放中发挥领导作用。