Table 1.

Korean COVID-19 Data during in-sample period from Jan.20.2020 to Dec.14.2020; (Values in Size${}^{\ast }$ indicate $n+h_p$ in the HAR($p$) models, where $n$ is the sample size, $h_p=7,14,21$ for $p=2,3,4$, resp.).

Data		Statistics
		Size${}^{\ast }$	Mean	SD	Min	Median	Max
Cumulative confirmed cases	$C{C}_t$	330	15 351.89	9723.06	1	12 935.5	43 484
Cumulative recovered cases	$C{R}_t$	330	12 722.35	8790.52	0	11 721.5	32 102
Cumulative death cases	$C{D}_t$	330	276.91	156.49	0	282	587
Recovery rate	$R{R}_t$	330	70.239	31.595	0	87.227	93.694
Fatality rate	$F{R}_t$	330	1.6431	0.6910	0	1.7517	2.3964
Infection rate for 14 days	$I{R}_t^{\left(14\right)}$	317	8.563	7.578	0	7.278	59.649
Infection rate for 21 days	$I{R}_t^{\left(21\right)}$	310	6.266	6.744	0	4.814	57.057