Table 3.

Comparing estimated mean mobility index within and between groups in US metro block groups in the top 10^th and bottom 10^th state-specific percentiles before (January 1, 2020-March 1, 2020) and after (March 11, 2020-April 19, 2020) the WHO announced a global pandemic.

	Estimated mean mobility in each time point		Within-group estimated measures			Between-group estimated measures
	t=0	t=1	${\hat{D}}_{j}$	${\hat{R}}_{j}$	${\hat{P D}}_{j}$	$\hat{D ı D}$	$\hat{R O R}$	$\hat{R P D}$
Top 10^th percentile, j = 1	3.88	1.74	−2.14	0.45	−55.2%	−1.51	0.54	3.27
Bottom 10^th percentile, j = 0	3.77	3.14	−0.64	0.83	−16.9%	−1.51	0.54	3.27
Least strict condition(s) sufficient for unbiasedness	1	1	3.1	3.1	3.1	4.1, 4.2	4.1, 4.2	3.1