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. 2019 Dec 28;22(1):44. doi: 10.3390/e22010044

Table 6.

Improvement by the extended model.

α + β Min Max Mean SD
Basic GARCH (1,1) 0.7695 0.9985 0.9040 0.06697
Extended GARCH (1,1) 0.4895 0.8752 0.6983 0.1051
Basic GARCH (1,1)-Extended GARCH (1,1) 0.06535 *** 0.4309 *** 0.2057 *** 0.08369 ***

Notes: *** denotes statistical significance at the 1% level.