Firm networks, borders, and regional economic integration
利用2004-2012年贸易和企业所有权微观数据，发现企业网络像贸易流一样随距离和边界减弱，考虑企业网络后，省级边界对贸易的估计效应下降近75%，表明边界对企业网络的阻碍显著影响省际贸易。
Abstract Borders reduce interprovincial trade relative to intraprovincial trade. Using trade and firm ownership microdata over a 9‐year period (2004–2012), we show firm ownership networks, like trade flows, diminish with distance and borders and that the estimated effect of provincial borders on trade may fall by almost 75% after accounting for firm networks. This suggests the weaker presence of firm networks across borders has a significant, although statistically imprecise, effect on interprovincial trade. These findings reinforce the view that understanding border effects require not only the identification of barriers to trade but also barriers to investment across borders.