Abstract：
Under the background of green development, the spatial structure of urban agglomerations (UA) has an important impact on urban land use efficiency (ULUE), but few studies have explored the impact mechanism between the two. This research explores the impacts of polycentric development on ULUE of UA, using data for 140 cities in China\'s top ten key UA covering the period from 2004-2019. The linkage between polycentric development and ULUE is explored by estimating models of determinants of ULUE. This research also examines the mechanism of the polycentric spatial structure of UA on ULUE by using a moderated mediation model. The main findings of the research can be concluded as below. The eastern UAs show a mostly polycentric spatial structure, whereas the central and western UAs show a weak polycentric spatial structure. The polycentric spatial structure of UA has a positive impact on ULUE. An inverted U-shape curve depicts the relationship between the polycentric spatial structure of UA and ULUE. However, the mediating variables, integration of industrial structure and factor mobility have a positive and partially mediating effect between the polycentric spatial structure of UA and ULUE. The infrastructure level has a positive U-shaped regulation effect, in which the impact coefficient of transport infrastructure is more significant. These findings provide empirical evidence for the coordinated development of China\'s regional space planning and ULUE.
摘要：
在绿色发展的大背景下,城市群空间结构对城市土地利用效率具有重要影响,但很少有研究探讨两者之间的影响机制。本研究探讨了多中心发展对UAULUE的影响，使用2004-2019年中国十大关键UA中140个城市的数据。通过估计ULUE决定因素的模型，探索了多中心发展与ULUE之间的联系。本研究还通过使用适度的中介模型研究了UA在ULUE上的多中心空间结构的机制。研究的主要发现可以总结如下。东部UA表现出主要是多中心的空间结构，而中部和西部的UA表现出弱的多中心空间结构。UA的多中心空间结构对ULUE有积极影响。倒U形曲线描绘了UA和ULUE的多中心空间结构之间的关系。然而,中介变量，产业结构与要素流动的整合在UA和ULUE的多中心空间结构之间具有积极的部分中介作用。基础设施层面具有正向U型调节效应，其中交通基础设施的影响系数更为显著。研究结果为我国区域空间规划与ULUE协调发展提供了实证依据。
