Table 1.

Summary statistics.

	Mean	Std. Dev	Skewness	kurtosis	J-B
COVID-19	11.923	2.089	−0.610	3.145	4.278
WOP	3.371	1.090	−5.871	43.503	5038.865∗∗∗
BOP	3.537	0.518	−0.408	1.859	5.571∗∗∗
NGP	0.600	0.065	−0.626	2.988	4.452
HOP	0.212	0.270	−0.334	1.905	4.664∗∗∗

Note: ∗∗∗ denote significance level at 1%.