| 摘要: |
| 城市发展中的雾霾问题仍然威胁着生态环境,探寻政策联合减霾效应且兼顾环境效益与经济
发展成为建设美丽中国新的目标。 基于 2006—2021 年的城市数据,运用多期双重差分评估国家智慧城
市试点和排污权交易城市试点对雾霾的影响。 研究显示,经过安慰剂检验等一系列稳健性检验之后,智
慧城市和排污权交易组合政策对城市减霾效果依旧显著,且政策效果具有时滞性。 同时,该组合政策通
过提升能源效率、促进技术创新的手段可以达到减霾目标,但产业升级效应的作用路径尚未显现。 进一
步研究发现,政策的减霾效果与地理位置、行政等级、经济集聚程度、资源依赖程度存在关联,呈现中部和
东部显著减霾而西部不显著的特征,且非重点、低经济聚集地、资源依赖低的城市减霾状态更加明显。 因
此,促进减霾需立足实际,联合智慧城市与排污权交易政策,提升能源利用效率和技术创新能力,减少高
资源依赖地区化石能源消费,把握地区、位置、资源差异,实现城市阶梯发展,推广试点经验。 |
| 关键词: 智慧城市 排污权交易 减霾 多期双重差分 |
| DOI： |
| 分类号: |
| 基金项目: |
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| The Combined Effects of the Smart City and the EmissionsTrading System on Urban Haze in China |
|
DENG Guangyao, WU You
|
| Abstract: |
| Urban haze remains a persistent threat to the ecological environment during city development. To
build a Beautiful China, exploring the synergistic haze reduction effects of policy combinations while balancing
environmental benefits and economic growth has emerged as a critical objective. Based on city-level panel data
from 2006 to 2021, this study employs a multi-period difference-in-differences (DID) approach to evaluate the
impact of two national pilot policies—the Smart City initiative and the Emissions Trading System (ETS)—on
urban haze. The results indicate that, after undergoing a series of robustness checks, including placebo tests,
the combined policy of the Smart City and ETS continues to demonstrate a significant haze reduction effect, with
the impact exhibiting a notable time lag. Furthermore, this policy combination achieves haze reduction goals by
enhancing energy efficiency and promoting technological innovation, although the pathway through industrial
upgrading is not yet evident. Additionally, the haze-reduction effectiveness of the policies is associated with
geographic location, administrative level, degree of economic agglomeration, and resource dependency.
Specifically, significant haze reduction is observed in central and eastern regions, but not in the western region.
Haze reduction effects are more pronounced in non-key cities, cities with low economic agglomeration, and
cities with low resource dependency. Therefore, to effectively mitigate haze, it is essential to tailor approaches
to local conditions by jointly implementing the Smart City and ETS policies, enhancing energy utilization
efficiency and technological innovation capacity, reducing fossil fuel consumption in highly resource-dependent
regions, taking into account regional, locational, and resource disparities, fostering tiered urban development,
and promoting pilot program experiences. |
| Key words: Smart City emissions trading haze reduction multi-period difference-in-differences |
