Usman, M., Komarudin, M., Sarida, M., Wamiliana, W., Russel, E., Kufepaksi, M., Ali Alam, I. and A.M. Elfaki, F. 2022. Analysis of Some Variable Energy Companies by Using VAR(p)-GARCH(r,s) Model : Study From Energy Companies of Qatar over the Years 2015–2022. International Journal of Energy Economics and Policy. 12, 5 (Sep. 2022), 178–191. DOI:https://doi.org/10.32479/ijeep.13333.