Extraído por máquina, não revisadoBase de evidências do MAGI
The Improvement of Air Quality and Associated Mortality during the COVID-19 Lockdown in One Megacity of China: An Empirical Strategy
Zhihu Xu e outros, 2021 · International Journal of Environmental Research and Public Health
Strict COVID-19 lockdown measures in Shijiazhuang reduced average daily NO2 concentrations by 8.94 μg/m3 relative to Baoding.
Estimativa · daily NO2 concentration reduction, μg/m3
8,94 [3,71; 14,2]
μg/m3
- Desenho
- Diferenças em diferenças. Difference-in-differences comparing locked-down Shijiazhuang to nearby Baoding
- População
- Shijiazhuang and Baoding, Hebei Province, China, from 20 December 2020 to 22 January 2021
- Amostra
- 68 · city-day observations across 2 cities over 34 days
Onde está o número
3. Results > 3.2. DID Results; Section 3.2, first paragraph
the daily NO2 and CO declined by 8.94 μg/m3 (95% CI: 3.71, 14.16) and 0.2 mg/m3 (95% CI: 0.04, 0.35), respectively, when weather controls and fixed effects were included
Contexto
What changed: Shijiazhuang enforced a strict lockdown closing workplaces and transit from 6 to 23 January 2021. Comparison: Difference-in-differences relative to neighboring Baoding, controlling for weather, city, and date fixed effects. Limits: Short 17-day period and single-treated-city setup during winter heating season.
Caminho no grafo
- FamíliaRegras e regulação
- TipoObrigações legais
- ResultadoPoluição atmosférica local
- EixoPoluição do ar
MAGI só cita evidência deste instrumento
Lugares do estudo
- Shijiazhuang · Município · CN
- Baoding · Município · CN
- Licença
- CC-BY
- Revisão
- Extraído por máquina, não revisadoExtraído por: gemini-3.8-flash, 2026-10-23