Author: Kai Chen; Meng Wang; Conghong Huang; Patrick L. Kinney; Anastas T. Paul
Title: Air Pollution Reduction and Mortality Benefit during the COVID-19 Outbreak in China Document date: 2020_3_27
ID: mmvbkbjw_3
Snippet: Health Commission (NHC) dropped to 20 (4 from Wuhan) ( Figure 1A ). Most Chinese provinces 23 have lowered the level of emergency responses. We thus defined the "during quarantine" period 24 as February 10 to March 14 and the "before quarantine" period as January 5 to 20. We excluded 25 the Chinese New Year holidays to avoid non-quarantine related air pollution reductions, based 26 on evidence from previous years ( Figure 1B) . We obtained daily .....
Document: Health Commission (NHC) dropped to 20 (4 from Wuhan) ( Figure 1A ). Most Chinese provinces 23 have lowered the level of emergency responses. We thus defined the "during quarantine" period 24 as February 10 to March 14 and the "before quarantine" period as January 5 to 20. We excluded 25 the Chinese New Year holidays to avoid non-quarantine related air pollution reductions, based 26 on evidence from previous years ( Figure 1B) . We obtained daily concentrations of nitrogen 27 dioxide (NO 2 ) and fine particulate matter (PM 2.5 ) in 367 Chinese cities. We then applied a 28 difference-in-difference approach to quantify air pollution changes due to the quarantine. 29
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