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The effect of innovation-driven development on pollution reduction: Empirical evidence from a quasi-natural experiment in China

机译：创新驱动发展对减少污染的影响：中国拟自然实验的实证证据

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摘要

Under the dual pressures of slowing economic growth and increasing environmental pollution in China, there is no doubt that relying on innovation to promote pollution reduction is the key to achieving compatible development between economic growth and environmental quality. Since previous studies have mostly explored the relationship between the two from the perspective of technological innovation, the endogeneity problem makes the research results lack credibility. This study attempts to fill this gap. Constructing a quasi-natural experiment based on the national innovative city policy, this study explores the impact and mechanism of innovation-driven development on pollution reduction using propensity score matching(PSM) and difference-in-differences(DID) models. The results demonstrate that the construction of national innovative cities has a positive effect on the reduction of pollution emissions intensity, which is mainly achieved through the improvement of urban innovation level and industrial R&D personnel concentration but has not effectively promoted pollution reduction through the advanced industrial structure. Additionally, national innovative city policy exhibits heterogeneous effects on pollution reduction. Specifically, the pollution reduction effect of big cities is weaker than that of small and medium-sized cities. The greater the manufacturing scale and the degree of financial support for science and technology, the stronger the pollution reduction effects. The pollution reduction effect shows a non-linear mechanism as pollution emissions intensity increases, and the overall trend is upward. Accordingly, corresponding policy recommendations are put forward based on the current weakness.
机译：在经济增长放缓和中国环境污染的增加的双重压力下，毫无疑问，依靠创新促进污染减少是实现经济增长与环境质量兼容发展的关键。由于以前的研究主要从技术创新的角度探索了两者之间的关系，但内生状率问题使得研究结果缺乏可信度。这项研究试图填补这种差距。本研究探讨了基于国家创新城市政策的准自然实验，探讨了创新驱动的发展对使用倾向评分匹配（PSM）和差异差异（DID）模型的影响的影响和机制。结果表明，国家创新城市的建设对减少污染排放强度的积极影响，这主要通过改善城市创新水平和工业研发人员集中，但通过先进的工业结构没有有效地促进污染减少。此外，国家创新的城市政策对减少污染效果。具体而言，大城市的污染减少效应比中小型城市较弱。制造规模越大，科学技术的财政支持程度，污染减少效应越强。污染减少效果显示出非线性机制，因为污染排放强度增加，整体趋势向上。因此，相应的政策建议基于目前的弱点提出。

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