Biu, Emmanuel Oyinebifun

Identification of Robust Garch Models with Symmetric and Asymmetric Process with the use of Beta Volatility Coefficient and Model Accuracy Measure

Biu, Emmanuel Oyinebifun, Orumie Ukamaka Cynthia & Ockiya, Atto Kennedy · Journal of Advances in Mathematics and Computer Science · 2023

The goal of this study was to identify a reliable GARCH model for modeling and forecasting each economic variable in Nigeria, including the price of crude oil, the consumer price index, the exchange rate, and the inflation rate. Monthly secondary data and simulated data sets were...

Open access Research Article 10.9734/jamcs/2023/v38i51759

Comparative Analysis of Additive and Multiplicative Error Terms of Weibull, Logistic Gompertz, Hills and Richards Models with Four Parameters

Joseph Dagogo, Orumie Ukamaka Cynthia & Biu, Emmanuel Oyinebifun · Journal of Advances in Mathematics and Computer Science · 2023

Three growth models (Richards, Gompertz, and Weibull) were estimated using a computer program employing a modified version of the Levenberg-Marquardt approach for solving non-linear regression models. With both small and high sample sizes, three data sets were collected. The most...

Open access Research Article 10.9734/jamcs/2023/v38i51758