This study considered the effects of outliers on the identification of heteroscedasticity in the daily closing share price returns series of Diamond Bank, Fidelity Bank and Skye bank using correlogram, Ljung-Box test and Lagrange Multiplier test. The data were obtained from Niger...
Open access
Research Article10.9734/ARJOM/2018/42517
This study considered Gross Domestic Product (N’ Billion) as the dependent variable (denoted by Yt), the Money Supply (N’ Billion) as the independent variable (denoted by X1t ) and the Credit to Private Sector as another independent variable (denoted by X2t). The data were obtai...
Open access
Research Article10.9734/JAMCS/2018/39949
Background: In modeling heteroscedasticity of returns, it is often assumed that the series are uncorrelated. In practice, such series with small time periods between observations can be observed to contain significant serial correlations, hence the motivation for this research. A...
Open access
Research Article10.9734/ajpas/2019/v4i230109
This study is aimed at identifying the problem associated with Ordinary Least Squares (OLS) in relation to the violation of assumptions of normality and constant variance. Mainly, the possible problem encountered when these assumptions are violated is the introduction of biases i...
Open access
Research Article10.9734/JSRR/2018/40909
Background: In linear time series, the in-sample model selection and the out-of-sample model selection are the two common approaches to model selection. However, empirical evidence based on out-of-sample forecast performance is generally considered more trustworthy than evidence...
Open access
Research Article10.9734/ajpas/2019/v4i330118