Threshold effects of COVID-19-confirmed cases on change in pollutants changes: evidence from the Chinese top ten cities.

Environ Sci Pollut Res Int · 2021 · PMC8055439 · PMID 33876371

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highly significantno p-value reported

We compared the parameter estimates of the threshold effect model and the fixed effect model, as shown in Table 9 . The results showed that in the fixed effect model, the impact of confirmed cases on PM2.5 concentration was negative, and it was highly significant at the 1% significance level.

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