中文摘要：

交通基础设施对经济资源的空间集聚具有重要影响,同时这种影响由于交通网络的逐步完善而呈现非线性关系。采用浙江省1998—2012年69个县级单位的面板数据,构造门槛面板模型进行实证分析。结果表明,交通基础设施对浙江省经济集聚的影响存在显著的三重门槛效应,交通基础设施供给在超过第一门槛值时将会对经济集聚产生更大的促进作用,然后由于市场拥挤效应使得这种影响出现下降。因此,政府应当加强交通路网的规划和综合运输体系的建设,以此吸引外部资源流入,增强地区竞争力。

英文摘要：

Transportation infrastructure has deeply influenced on spatial agglomeration of economic resources. Moreover suchinfluence perform as a non-linear relationship for the transport network s improving. Using 69 units county-level panel dateof Zhejiang province from 1998 to 2012,we construct threshold panel model to carry out empirical analysis. As the re-search results show,there exists obvious triple-threshold effect of the transportation infrastructure on Zhejiang province eco-nomic agglomeration. When the transportation infrastructure supply exceeds the first threshold value will have a stronger im-pact on economic agglomeration,and then this influence will reduce as to the market crowding effect. Therefore,governmentshould improve the planning of transport network and comprehensive transportation system,as useing it to absorb externalresources and enhance the regional competitiveness.