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This paper studies how centralizing environmental administration affects air pollution in China. China launched a reform in 2016 to empower upper-level environmental protection bureaus to administer lower-level bureaus vertically through personnel control. Exploiting a stacked difference-in-differences strategy, we find that the reform significantly reduced air pollution. The effect was stronger in places where pollution was less likely to be affected by spillovers from other provinces, where local governments initially paid less attention to environmental protection, and where there was less economic importance. Further analysis shows that the reform reduced pollution by strengthening the pollution reduction incentives of local environmental officials, increasing the intensity of local environmental inspection, and promoting environmental compliance by polluting firms. [ABSTRACT FROM AUTHOR]

In this paper, we investigate the impact on air pollution of China's 2017 policy banning waste imports. We exploit a difference-in-differences strategy combining the time variation and cross-prefecture variation in waste imports before the policy change. We find that prefectures that imported waste in the prepolicy period experienced greater air quality improvements after the policy shock. This effect is stronger in regions with loose environmental regulations and poor waste utilization capacity. Further investigation shows that reductions in both the burning of unrecyclable waste and the level of industrial production are channels through which the waste import ban reduced air pollution. [ABSTRACT FROM AUTHOR]

Combining time variations, cross-province variations in policy intensity, and variations in pollution intensity across industries, we estimate the impact of environmental regulation on firm exports. We find that in more pollution-intensive industries, stricter environmental regulation reduces both the probability that a firm will export and the volume of exports. Heterogeneous tests show that the impact is smaller for SOE firms and for firms located in the central and western part of China. We also find that the reduced probability that a firm will export is driven by a decline in non-exporters entering the export market. [ABSTRACT FROM AUTHOR]