Lockdown measures and air quality: evidence from Italian provinces.

The aim of this short communication is to estimate the effects of the implementation of more restrictive lockdown measures on pollution levels in Italy. Using a time series of weekly concentrations of PM, PM and NO for the period 2016-2020 across 71 provinces, we find that the introduction of lockdown measures reduced the air concentration levels of PM and NO by 17-18%, while their effect on PM remains unclear. These results indicate that the lockdown had a significant positive impact in terms of lives saved and improved air quality.