. 2020 Oct 5;22(10):e21955. doi: 10.2196/21955

Table 1.

Arellano-Bond dynamic panel data modeling of the number of daily infections reported by state, August 2-30, 2020.

Variable	Region 1		Region 2		Region 3			Region 4
	Coefficient	P value	Coefficient	P value		Coefficient	P value		Coefficient	P value
L1Pos	0.084	.22	–0.102	.02		–0.012	.77		0.273	<.001
L1shiftAug17	–0.129	.16	0.069	.24		0.221	.02		–0.213	.03
L1shiftAug24	–0.112	.19	0.093	.10		–0.021	.84		–0.737	<.001
L7Pos	0.151	.02	0.288	<.001		0.269	<.001		0.006	.93
L7shiftAug17	–0.014	.87	–0.024	.67		–0.334	<.001		0.018	.79
L7shiftAug24	0.004	.96	0.046	.49		–0.265	.003		0.397	.02
Tests	0.003	.12	0.047	<.001		0.091	<.001		0.017	.048
Tests_squared	7.12E-09	.61	–5.05E-07	<.001		–4.89E-07	<.001		2.74E-08	.48
Tests_per_10K	1.072	.04	8.023	.002		–15.986	<.001		—^a	—
Weekend	–14.751	.20	23.581	.28		–33.948	.58		51.977	.34
Constant	124.637	<.001	46.461	.89		429.167	<.001		397.678	<.001
Wald statistic for regression	χ²₁₀=132	<.001	χ²₁₀=590	<.001		χ²₁₀=475	<.001		χ²₁₀=316	<.001
Sargan statistic for validity	χ²₂₅₂=258	.38	χ²₃₃₈=373	.09		χ²₄₈₃=446	.89		χ²₃₆₈=370	.46

^aRegion 4 did not include the Tests_per_100K variable due to collinearity.