Table 7.

Wind and PM 2.5 IV — Controlling for severity of the pandemic .

	Cases			Deaths
	(1)	(2)	(3)	(4)	(5)	(6)
Weighted PM 2.5	0.146**	0.147**	0.149**	0.00917	0.00951*	0.00957*
	(0.0683)	(0.0683)	(0.0682)	(0.00571)	(0.00572)	(0.00573)
F Stat	14.28	14.27	14.27	14.28	14.28	14.28
Dep Var Mean	7.875	7.875	7.875	0.216	0.216	0.216
Pct change mean	1.854	1.867	1.886	4.251	4.407	4.437
Controls	✓	✓	✓	✓	✓	✓
County & State-by-week FEs	✓	✓	✓	✓	✓	✓
Days since first death	✓			✓
Cumulative cases 7 days prior		✓			✓
Cumulative cases 14 days prior			✓			✓
Observations	97,885	97,885	97,885	97,885	97,885	97,885

${}^{\ast }$$p<0.1$, ${}^{\ast \ast }$$p<0.05$, ${}^{\ast \ast \ast }$$p<0.01$. Standard errors clustered at the county level in parentheses. Controls include state-level and county-level policy adoption, wind speed, minimum and maximum daily temperature, precipitation, prior two-week social distancing behavior, day-of-week, and two lagged wind direction-by-monitor cluster interactions. All regressions include county and state-by-week fixed effects. Displayed output of sensitivity tests including three additional controls related to the county-level severity of the pandemic. Columns (1) and (4) include a control for the number of days since the first reported death in a given county. Columns (2) and (5) include a control for the cumulative number of cases or deaths, respectively, seven days prior to day of the case or death incidence outcome in the same county. Columns (3) and (6) include a control for the cumulative number of cases and deaths 14 days prior to the case or death outcome. F-statistics of the relevance test are computed assuming first-stage standard errors are not serially correlated.