中文摘要：

产业链是产业与空间相互交织的一种分工与协调形式,是分工促进地区生产率提高的一种实现形式;通过产业链上的组织经济法则,可降低产业链上的交易费用。在考虑产业链上节点产业的空间分布属性后,把空间联结密度引入分工模型,联结密度不仅有助于降低产业之间的交易费用,而且有助于促进产业链分工。这里通过理论和实证分析,验证了此假说：市场范围与联结密度的交互性对产业链分工程度的提高有显著积极影响。

英文摘要：

Industrial chain （IC） is a kind of division and coordination between industries and location, through which division of labor can improve local labor productivity. By the law of economy in organization, the transactions cost occurred on the IC can be reduced. After considering the nature of spatial distribution of node industry in IC, introducing the linkage density into model of division, linkage density can not only reduce transactions cost between industries, but improve the degree of division of IC. The paper test theoretically and empirically confirms the hypothesis that the interaction of the extent of market and linkage density has significantly positive impact on the de~ree improvement of division of IC.