Table 2.

F- and t-values for electricity prices in Germany.

		2017	2018	2019	2020
2017	F-value	1
	t-value	0
2018	F-value	0.8477${}^{\ast \ast \ast }$	1
	t-value	−10.5837${}^{\ast \ast \ast }$	0
2019	F-value	1.0908	1.2868${}^{\ast \ast \ast }$	1
	t-value	−17.6584${}^{\ast \ast \ast }$	−6.0929${}^{\ast \ast \ast }$	0
2020	F-value	0.7775${}^{\ast \ast \ast }$	0.9171	0.7127${}^{\ast \ast \ast }$	1
	t-value	26.8845${}^{\ast \ast \ast }$	35.8371${}^{\ast \ast \ast }$	43.8592${}^{\ast \ast \ast }$	0

${}^{\ast }$Significance: $p<0.05$, ${}^{\ast \ast }p<0.01$${}^{\ast \ast \ast }p<0.001$.