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. 2020 Oct 26;10:18241. doi: 10.1038/s41598-020-75318-9

Table 1.

Estimate social ties and SARS memory effects on lead-time advantage.

	Dependent variable
	Lead-time $Δ t_{i}$ ( $C = 3.0$ )
	(1)	(2)	(3)	(4)	(5)	(6)	(7)
$S A R S_{i}$	1.916***		2.566***		4.644	1.590***	− 2.276
$S A R S_{i}$	(0.345)		(0.664)		(4.531)	(0.593)	(4.016)
Social ties $D_{i}$		− 3.222***	− 2.753***		− 2.310***	− 1.476***	− 1.367***
Social ties $D_{i}$		(0.271)	(0.286)		(0.372)	(0.315)	(0.334)
$D_{i} * S A R S_{i}$			− 0.617***		− 0.660***	− 0.412**	− 0.453**
$D_{i} * S A R S_{i}$			(0.238)		(0.243)	(0.206)	(0.211)
$log (d_{i})$				− 3.567***	− 1.125	− 1.744***	− 2.139***
$log (d_{i})$				(0.527)	(0.720)	(0.490)	(0.637)
$log (d_{i}) * S A R S_{i}$					− 0.267		0.583
$log (d_{i}) * S A R S_{i}$					(0.679)		(0.599)
$S u b P r o v i n c i a l_{i}$						8.516***	8.763***
$S u b P r o v i n c i a l_{i}$						(1.135)	(1.163)
$G D P_p e r_c a p i t a_{i}$						2.818***	2.762***
$G D P_p e r_c a p i t a_{i}$						(0.599)	(0.602)
Constant	− 8.571***	3.766***	1.610	16.287***	7.441*	− 22.169***	− 19.291**
Constant	(0.470)	(1.007)	(1.104)	(3.523)	(4.121)	(7.068)	(7.662)
Observations	306	306	306	306	306	305	305
R²	0.092	0.318	0.357	0.131	0.368	0.535	0.537
Adjusted R²	0.089	0.316	0.351	0.128	0.358	0.526	0.526
Residual SE	7.356 (df = 304)	6.376 (df = 304)	6.211 (df = 302)	7.196 (df = 304)	6.176 (df = 300)	5.312 (df = 298)	5.312 (df = 297)
F statistic	30.820*** (df = 1; 304)	141.645*** (df = 1; 304)	55.885*** (df = 3; 302)	45.859*** (df = 1; 304)	34.999*** (df = 5; 300)	57.218*** (df = 6; 298)	49.170*** (df = 7; 297)
AIC	2093.70	2006.20	1992.24	2080.25	1990.93	1893.62	1894.77

*p **p ***p < 0.01.