Table 7.

First stage regressions: impact on exposure variable, conditional on fixed effects.

	(1)	(2)	(3)	(4)	(5)	(6)
Revised cases (commuting)	0.14***		0.16***	0.40***
	(0.01)		(0.01)	(0.13)
Unpredicted cases (commuting)	0.07***				0.07***	0.11*
	(0.02)				(0.02)	(0.06)
Revised cases (local)		0.12***		−0.22*
		(0.01)		(0.11)
Unpredicted cases (local)		0.30***				−0.18
		(0.07)				(0.19)
Observations	583,301	414,944	583,301	443,044	583,301	414,944
State-day fixed effects	Yes	Yes	Yes	Yes	Yes	Yes
F statistic	146.5	144.3	213.4	67.66	18.95	206.6

Notes. ***$p$ $<$ 0.01, **$p$ $<$ 0.05, *$p$ $<$ 0.1. Estimated in first differences. Twoway (county and day) clustered standard errors in parentheses. Revised cases refer to ex post corrections in the count statistics. Unpredicted cases refer to the deviation in cases numbers from the two-day lagged weekly trend. Variables labeled “commuting” employ the between-county commuting flows as weights. Variables labeled “local” concern exposure within the county.