【synthetic control method】Did Olympic Games improve air quality in Beijing? ~

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《Did Olympic Games improve air quality in Beijing? Based on the synthetic control method》

此篇论文发表在2016年Environmental Economics and Policy Studies上。三位中国学者使用synthetic control method来评估北京奥运会之后北京空气质量的改善状况。

简介

During preparations for the Olympic Games, Beijing issued a series of environmental policies to increase environmental governance. Using Synthetic Control Method, which appeared in a comparative case study recently, we estimated the impact of the Beijing 2008 Olympic Games on Beijing’s air quality in this paper. The results show that Beijing’s air quality significantly improved after 2008; average annual air pollution days reduced by 25 days, and the result is significant on the level of 3.2 %. But after 2010, these effects disappeared gradually. Furthermore, considering winter is the most polluted season of Beijing, this paper further examined the impact of these environmental policies on the air quality in winter. We find that after the Olympics, the improvement of air quality in Beijing mainly occurred in other seasons, winter air quality did not significantly improve.

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关键词：Synthetic quality control Beijing Improve control method