Mathematical Modeling of the Price Volatility of Maize and Sorghum between 1960 and 2022

Table 6.

Diagnostic Test for the Two Best Fitted GARCH Family Models

Heteroskedasticity Test: ARCH    

  IGARCH(1,1) – MAIZE  
F-statistic 0.748158     Prob. F(1,749) 0.3873
Obs*R-squared 0.749407     Prob. Chi-Square(1) 0.3867
  IGARCH (1,1) - SORGHUM  
F-statistic 3.203876     Prob. F(1,724) 0.0739
Obs*R-squared 3.198572     Prob. Chi-Square(1) 0.0737