中文摘要：

合理的城市体系分布是资源空间配置优化和区域经济协调发展的必要条件。本文从区域城市化发展模式的角度出发，分析了多中心发展对地区收入差距的影响机制，并创新性地应用DSMP/OLS夜间灯光数据，对省份内部的空间结构和地区收入差距进行测度，进而实证考察了多中心发展带来的地区收入差距缩减效应。研究发现，多中心空间发展模式的确有利于缩小地区收入差距，且多中心发展的地区收入差距缩减效应主要通过优化区域内中小城市的产业结构和加快区域内的商品流通来实现。本文还考察了经济发展、基础设施以及省域平均距离对于多中心发展的地区收入差距缩减效应的影响。结果表明，在经济发展水平较高、基础设施条件较好且城市间距离适中的地区，多中心发展对地区收入差距的缩减效应更为明显。本文的研究不仅对中国缩小地区差距方面的政策制定具有重要的启示，也为未来城镇化发展的道路选择提供了一定的经验依据。

英文摘要：

Reasonable distribution of urban system is a necessary condition for optimized spatial resource allocation and coordinated regional economic development. From the perspective of regional urbanization pattern, this paper analyzes the impact mechanism of polycentric development on regional income disparities. The DSMP/OLS nighttime lighting data is innovatively applied to measure the spatial structure and regional income gap within the province, and then the regional income disparities reduction effect from the polycentric development is investigated empirically. The results show that the polycentric development mode is indeed beneficial to narrow the regional income gap, and its impact degree will gradually increase with the improvement of economic development level. Further analysis of the mechanism illustrates that the income gap reduction effect in polyeentric-development areas is mainly achieved by optimizing the industrial structure of the small and medium-sized cities and accelerating the flow of elements in the zone. Moreover, the intensity of this effect will be restricted by the regional level of infrastructure development. In the areas with better infrastructure, the positive influence of polycentric development on reduction effect of regional income disparities becomes more obvious. This paper not only has important enlightenment to the policy making of narrowing the regional income disparities in China, but also provides certain empirical basis for the selection of urbanization patterns in the future.