ir.bowen.edu.ng:8181/jspui/handle/123456789/392 These are articles published in journals by academics staff Thu, 02 Apr 2026 17:50:53 GMT 2026-04-02T17:50:53Z ir.bowen.edu.ng:8181/jspui/handle/123456789/1254 Title: Rainfall Trend and its Implications for Sustainable Crop Production and Water Resources Management: A Case Study of Iwo, Nigeria Authors: Ogunbode, T. O.; Esan, V.I; Samson, T. K.; Oyelowo, O.J.; Asifat, J.T Abstract: Studies have revealed that the pattern of rainfall will change in view of climate change scenario being experienced globally. Thus, a thirty-year (1989-2018) rainfall data analysis was conducted for Iwo in Osun State, southwestern Nigeria to determine the trend pattern of rainfall. One parameter Mann-Kendall statistic was used in the analysis of the data. The results showed that while five months (February, April, July, August and December) showed negative trend (Negative y-values) indicating declining rainfall over the period, seven months (January, March, May, June, September, October and November) revealed a positive trend (positive y-values) implying increasing rainfall over the period for those months. However, the general analysis of the 30-year data showed that there was negative trend in rainfall in the study area which means that there is general fall in the rainfall incidence over the period in Iwo. The results of monthly trend indicated that rainfall is no longer dependable for a viable agricultural practice, and so water conservation methodologies need to be embarked upon in order to salvage crops from the shortfall in the rain caused by climate change. It is therefore, recommended that shifting in the planting dates, irrigation, planting cover crops and planting heat tolerant crops and early matured crop varieties among others should be considered by farmers, especially the small scale farmers. Stakeholders in water resources management holds the responsibility on averting water scarcity and the challenge of water pollution in view of the erratic rainfall to ensure human survival. Sat, 01 Jan 2022 00:00:00 GMT ir.bowen.edu.ng:8181/jspui/handle/123456789/1254 2022-01-01T00:00:00Z ir.bowen.edu.ng:8181/jspui/handle/123456789/1253 Title: COVID-19 Pandemic and Volatility Persistence of the Nigerian Crude Oil Price Authors: Samson, T. K.; Raheem, M. A. Abstract: mpacts of COVID-19 pandemic on the global economy cannot be overemphasized, especially with Nigeria, which largely depends on crude oil as a major source of her revenue. Thus, investigating COVID-19’s impacts on the volatility persistence of Nigerian crude oil price forms the nucleus of this study. Our modelling framework was based on GARCH, EGARCH and GJR-GARCH with two asymmetric innovation distributions Daily price data on the Nigerian crude oil sales (in dollars per barrel), ranging from 4th Jan., 2010 to 27th May, 2021, were obtained from the Central Bank of Nigeria (CBN). To capture the impact of the pandemic, the data were divided into two periods, before Covid-19 was proscribed as a pandemic by World Health Organisation (01/04/2010 to 10/03/2020) and during COVID-19 pandemic (11/03/2020 to 27/05/2021). Result shows that the leverage effect were positive and significant in both periods which indicates that positive shocks increases volatility more than negative news of the same sign. Also, EGARCH-SSTD and GJR-GARCH (1,1)-SSTD were the best fitted models for before and during pandemic respectively. Result shows that volatility persistence was higher during COVID-19 period (1.012639) than before the COVID-19 pandemic (0.988749) .There was also an increase and over persistence in the volatility of Nigerian crude oil price during COVID-19 than before COVID-19 period. Sat, 01 Jan 2022 00:00:00 GMT ir.bowen.edu.ng:8181/jspui/handle/123456789/1253 2022-01-01T00:00:00Z ir.bowen.edu.ng:8181/jspui/handle/123456789/1246 Title: Relationship between Air Temperature and Rainfall Variability of Selected Stations in Sub-Sahara Africa Authors: Aweda, F. O.; Samson, T. K. Abstract: This current study was conducted on rainfall and air temperature data obtained from the archive of the HelioClim website to determine the relationship between the two parameters. The study aimed at the relationship between rainfall and air temperature. The data of thirty-four (34) years spanning from 1985 to 2019 was analyzed using Mann-Kendal statistics on the trend of the rainfall series while the normality of rainfall series was determined using Kolmogorov Smirnov test across six southwest stations of Nigeria. The results revealed the highest mean rainfall in Akure (198.9 mm) while the least rainfall in Ado-Ekiti (163.4 mm). The maximum rainfall was in Abeokuta (865.8 mm) with Iwo having the highest disparity in rainfall (SD=148.8 mm) compared with other stations. The skewness in Abeokuta (Skewness = 0.9 mm) was higher compared with Ado-Ekiti, Akure, Ibadan, Ikeja and Iwo with skewness values of 0.7 mm, 0.4 mm, 0.7 mm, 0.6 mm and 0.7 mm, respectively. The maximum air temperature was recorded in Iwo (301.7 K) and the minimum air temperature in Ado-Ekiti (293.3 K). The skewness obtained in Akure (-0.2) and Ikeja (-0.3) was less than zero indicating that air temperature decreased more than it increased in these areas while in other stations, Abeokuta (0.01), Ado-Ekiti(0.22), Ibadan (0.02) and Iwo (0.24), the skewness was greater than zero meaning that air temperature increased more than it decreased in these stations. Sat, 01 Jan 2022 00:00:00 GMT ir.bowen.edu.ng:8181/jspui/handle/123456789/1246 2022-01-01T00:00:00Z ir.bowen.edu.ng:8181/jspui/handle/123456789/1245 Title: Examining the Link between Technical Efficiency, Corporate Governance and Financial Performance of Firms: Evidence from Nigeria Authors: Lawal, A. I.; Lawal-Adedoyin, B. B.; Olakanmi, O.; Samson, T. K.; Ike, N. T.; Ajayi, A. S.; Adeniran, F. S.; Ezekiel, O.; Oyelude, O.; Adigun, G. Abstract: The purpose of this study is to examine the link between technical efficiency and both the corporate governance and financial performance of listed financial firms on the floor of the Nigerian Stock Exchange using three theoretical approaches: shareholder theory, stakeholders’ theory, and resource dependence theory. We employed a stochastic frontier analysis to examine the impact of technical efficiency on the link between corporate governance and financial performance on the one hand, and, on the other, multiple regressions comprised of OLS and Poisson estimates to analyze a data-generating set sourced from 2007 to 2020. The results of our OLS estimates suggest that a negative but significant relationship exists between the corporate governance mechanism and the financial performance of the listed firms. When we subject the analysis to the Poisson estimates, the relationship becomes positive and significant. Our results have some positive implications Sat, 01 Jan 2022 00:00:00 GMT ir.bowen.edu.ng:8181/jspui/handle/123456789/1245 2022-01-01T00:00:00Z