The evolution of transport networks and the regional water environment: the case of Chinese high-speed rail
研究了高铁网络演变如何通过产业集聚改善区域水环境，发现高铁网络中心性高的城市工业水污染更少，高技能劳动力向清洁产业集聚。
We investigate empirically the role of an evolving high-speed rail (HSR) network in improving the regional water environment via industry agglomeration. We use Graph Theory to construct a data set reflecting a continuous evolution of cities’ accessibility to the HSR network. We find that cities with higher degree and closeness centralities in the HSR network tend to have less industrial water pollution. The reallocation of a high-skilled labour force leads to the agglomeration of skill-intensive and clean industries in cities with higher HSR centralities. We show that the evolution of the HSR networks is indeed conducive to the sustainable regional development.