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Evaluation of the Influence of the Chengdu-Chongqing Economic Circle as an Economic Center and Enhancement Strategies: An Empirical Analysis Based on SDID and Entropy- Weighted TOPSIS
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作者 Zhou Dong 《Contemporary Social Sciences》 2025年第5期65-84,共20页
This paper focuses on Chengdu and Chongqing’s positioning as important economic center in western China and their evolving into an economic center of national influence.On the one hand,it uses the synthetic differenc... This paper focuses on Chengdu and Chongqing’s positioning as important economic center in western China and their evolving into an economic center of national influence.On the one hand,it uses the synthetic difference-in-differences(SDID)method to analyze the impact of policies since 2011 designed to build Chengdu and Chongqing into an important economic center in western China.On the other hand,it employs the entropy-weighted TOPSIS method to comprehensively evaluate the influences of ten core Chinese cities as economic centers within four major urban agglomerations,as well as conduct an analytical assessment of the Chengdu-Chongqing economic circle from key perspectives such as its capacity to lead,capacity to agglomerate,and capacity to radiate.From a longitudinal historical perspective,both Chengdu and Chongqing have benefited significantly from policies designed to build an important economic center in western China,and which laid a foundation for building an economic center of national influence.From a horizontal regional comparison,among the ten core cities evaluated as economic centers within the four major urban agglomerations,Chengdu and Chongqing ranked in the middle,possessing a moderate but not yet outstanding influence.Consequently,to evolve into an economic center of national influence,the Chengdu-Chongqing economic circle should leverage its relative advantages in connectivity,market size,value chain division of labor,policy attractiveness,and industry development.It can enhance its influence by strengthening the complementarity of its economic resources,overcoming the administrative inertia,accelerating the establishment of a regional innovation system,broadening the scope of its economic radiation,and promoting its comprehensive and all-dimensional opening-up. 展开更多
关键词 Chengdu-Chongqing economic circle influence of economic center urban agglomeration entropy-weighted TOPSIS method synthetic difference-in-differences(sdid)
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大数据背景下中国环保政策减排效应的评估
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作者 付连艳 代珂盈 +1 位作者 张子晗 赵禾禾 《沈阳师范大学学报(自然科学版)》 2025年第6期530-548,共19页
合成双重差分(synthetic difference-in-differences,SDID)方法是近年来评估因果效应和进行政策评价的主要工具之一。传统SDID方法基于面板双向固定效应模型,难以有效识别混杂因素,且未对其进行明确调整。为此,融合SDID框架与半参数面... 合成双重差分(synthetic difference-in-differences,SDID)方法是近年来评估因果效应和进行政策评价的主要工具之一。传统SDID方法基于面板双向固定效应模型,难以有效识别混杂因素,且未对其进行明确调整。为此,融合SDID框架与半参数面板数据模型,提出一种半参数合成双重差分方法。该方法通过去除个体和时间固定效应,采用局部线性最小二乘法进行半参数估计,进而计算处理组与合成对照组之间的双重差分效应。理论推导与证明表明了所提出估计量的良好渐近性质。在实证部分,基于《中华人民共和国环境保护法》和《中华人民共和国环境保护税法》评估了规制政策与激励措施对企业节能减排的实际效果。结果为企业与政府科学运用环境政策引导污染治理提供了新依据,也为推动制造业绿色转型提供了新模型与方法支撑。 展开更多
关键词 半参数sdid方法 因果效应 环保补贴 企业碳排放
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