Table 2.

COVID-19 deaths as of September 2nd, 2020.

Treatment vs control groups	Threshold for less-travelling counties
	0.9	1.8	2.8	3.7
# of less-travelling counties	354	53	13	5
# of more-travelling counties	1,664	1,965	2,005	2,013
Average deaths (treatment)	15	15	23	2
Average deaths (control)	106	92	90	90
Treatment − control	−90	−77	−67	−88
Total deaths (treatment)	5,486	770	295	8
Total deaths (control)	175,643	180,359	180,834	181,121
Treatment − control	−170,157	−179,589	−180,539	−181,113

Notes: Less-travelling counties are defined as those where the maximum (during the sample period) weekly increase in the percentage of people who who stay in the same county is more than the threshold. Thresholds represent τ_c = j ×  max (max(ΔS_c,t| c)| t) for j ∈ {0.2,0.4,0.6,0.8}.