Structure and evolution of global cluster networks: evidence from the aerospace industry
利用北美和欧洲52个航空航天集群的企业关联数据，研究发现空间交易成本下降促使集群按价值链环节专业化，网络从地理本地化结构演变为跨区域的层级结构。
We use a new panel dataset to study the network of formal firm linkages within and across 52 aerospace clusters in North America and Europe. Our theoretical framework, built upon the knowledge-based cluster and global value chains literature, suggests that a reduction in spatial transaction costs has induced clusters to specialize in increasingly fine-grained value chain stages. This should cause the overall network to evolve from a geographically localized structure to a trans-local hierarchical structure that is stratified along value chain stages. Applying community structure detection techniques and organizing sub-networks by linkage type, we find empirical evidence in support of this proposition.