Yildirim, Hakan; Bekun, Festus Victor - In: Future Business Journal 9 (2023), pp. 1-8
root test and the series were found to be stationary. After reaching the average equation model as ARMA (2.2), it was … tested whether there was an ARCH effect in the ARMA (2,2) model. As a result of the applied ARCH-LM test, it is reached that …