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The purpose of this paper is to look at the asymmetric effect of oil production on environmental degradation in OPEC member countries from 1970–2019.

The authors build a nonlinear panel ARDL–PMG model using the Shin et al. (2014) nonlinear autoregressive distributed lag (ARDL) approach in panel form to assess both the short- and long-run impact of positive and negative oil production movements on CO₂ emissions.

The result demonstrates that the variables are cointegrated. According to the linear long run coefficients, oil production, FDI inflows and economic growth both have a positive and significant relationship with CO₂ emissions, implying that they deteriorate environmental quality in OPEC countries, while renewable energy has a negative relationship with CO₂, implying that increasing renewable energy improves environmental quality. The asymmetric findings prove that positive and negative shocks of oil production exert a positive effect on carbon emissions in short run and long run.

To begin with, the empirical assessments do not include all OPEC member nations; researchers are advised to resolve this constraint by looking at the economies of other OPEC members. Albeit the lack of data for other energy sources may serve as another constraint of this research, future research is expected to broaden the current framework via other energy sources such as nuclear, electricity, biomass, solar as well as wind.

The research adds to the body of knowledge as many of the prevailing studies in the literature failed to look at the asymmetric effect of oil production on the quality of environment. This is another gap in the literature that the current study is set out to fill. This study adds oil production as an explanatory variable and helps to extend the existing literature for OPEC countries, which could propose a solution to deal with ensuing environmental issues.

Drawing from tripartite theory of attitude, this study examined whether interaction effect of psychological ownership (cognitive component) changes the nature of the relationship between job satisfaction (affect component) and job performance (behavioral component) toward a higher or weaker relationship. Furthermore, the study draws from psychological ownership theory to find support whether job satisfaction is nurtured by the feeling of psychological ownership.

Longitudinal data from 211 academic and non-academic employees was randomly collected and partial least square-structural equation model (PLS-SEM) was used for data analysis through SmartPLS version 3.3.2.

The study found a positive interaction effect of psychological ownership on the relationship between job satisfaction and job performance. Furthermore, the study found that feeling of psychological ownership nurtures employees' satisfaction with their job.

The findings of the study explicate to human resource managers and practitioners the mechanism through which job satisfaction affects job performance and how feelings of psychological ownership nurtures employees' satisfaction with their job.

The study provides new insight into the relationship between job satisfaction and job performance by drawing on the tripartite theory of attitude perspective, and concluded that job performance as overall employee attitude toward the organization is predicted by the interaction and interplay of job satisfaction, psychological ownership and job performance as components of attitude. To the authors’ best knowledge, none of the previous literatures on job satisfaction–job performance relationship draws its conclusions from the perspective of tripartite theory of attitude. Furthermore, the study found empirical evidences that psychological ownership nurtures employees' job satisfaction.

The purpose of this paper is to examine the current gap existing between ethics theorization and enforcement in the Nigerian leadership system.

In an attempt to achieve the objective of the paper, some ethical issues in the Nigerian governance and the several regulatory and enforcement agencies set up to curb ethical menace were critically examined. The achievements of the bodies were also evaluated.

The paper concludes that the apparent gap which continues to exist is not a function of ethical definition but results from challenges in the enforcement which are thematically grouped under leadership, societal and individual variables.

The analysis suggests that bridging the ethical gap in Nigeria depends largely on leadership which must be by example.

This paper presents an invaluable challenge to leadership in Nigeria who must reposition their responsibility.

This study aims to contribute to the emerging discourse on elite financial crime, with particular attention devoted to the role played by the legislature in corrupt practices in Nigeria. Separations of power, watchdog role of legislature and ideologies have become a major influence in democratic system. Legislative power has developed as a means of providing oversight functions over the executives, thereby inhibiting fraudulent practices in governments.

The paper argues that the political institutional structures embedded with monopoly, discretion and little or no accountability facilitate financial corrupt practices within the legislature. The paper uses publicly available evidence to show that the legislators in developing countries are actively engaged in corrupt practices.

The evidence provided in this paper shows that separation of power and representative democracy had not brought about transparency and accountability in government activities in Nigeria. Legislature often trade-off their constitutional power and their claim of service to the public interest by engaging in financial criminal practices.

This paper does not set out to provide a comprehensive analysis of political corruption. Instead, it considers the “dark” side of legislative practice by examining the involvement of legislature in facilitating corrupt financial practices in Nigeria.

The inability of the regulators to effectively sanction legislators implicated in corrupt practices suggests that the current institutional and regulatory apparatus are not fully equipped in dealing with the financial criminal activities of legislators.

Despite the arrest and prosecution of some legislators, a number of cases are swept under the carpet. Therefore, this paper suggests that Nigeria need to reform its political system and institutions to promote transparency and accountability in government and to build trust in the legislative process.

This paper considers the “dark” side of legislative practice by examining the involvement of legislature in facilitating corrupt financial practices in Nigeria.

This study aims to develop a model which incorporates the impact of both aleatory and epistemic uncertainties into construction duration predictions, in a manner that is consistent with the nature/quality of information available about various factors which bring about uncertainties.

Data relating to 178 completed Tertiary Education Trust Fund (TETfund) building construction projects were obtained from construction firms via questionnaire survey. Using 90% of the data, the model was developed in the form of a hybrid-based algorithm implemented through a suitable user-friendly graphical user interface (GUI) using MATLAB programming language. Bayesian model averaging, Monte Carlo simulation and fuzzy logic were the statistical methods used for the algorithm development, prior to its GUI implementation in MATLAB. Using the remaining 10% data, the model's predictive accuracy was assessed via the independent samples t-test and the mean absolute percentage error (MAPE).

The developed model's predictions were found not statistically different from those of actual duration estimates in the 10% test data, with a MAPE of just 2%. This suggests that the model's ability to incorporate both aleatory and epistemic uncertainties improves accuracy of duration predictions made using it.

The model was developed using a particular type of building projects (TETfund building construction projects), and so its use is limited to projects with characteristics similar to those used for its development.

The developed model's predictions are expected to serve as a useful basis for consultancy firms and contractor organisations to make more realistic schedules and benchmark measures of construction period, thereby facilitating effective planning and successful execution of construction projects.

The study presented a model which permits combined manipulation of aleatory and epistemic uncertainties, hence ensuring a more realistic incorporation of uncertainty into construction duration predictions.

Gives a brief history of the Abubakar Tafawa Balewa University, Bauchi, Nigeria. Points out that this university first had to use a temporary building for nine years even though the facilities in it were inadequate. Focuses on the new library building of this university commissioned on 10 November 1990. Describes the main sections of the new library including its facilities. Draws attention to inadequacies of the building. Finally concludes that the new library building is by all standards a functional one.

The purpose of this paper is to examine the appropriateness of faith‐based model (FBM) as a veritable policy response to the issue of poverty alleviation and actualisation of the millennium development goals (MDGs) in Nigeria.

The paper combined qualitative and quantitative date to validate the appropriateness of FBM, to tackling poverty issues in Nigeria. The first section presents a brief introduction on poverty issue in Nigeria. The second section outlines the theoretical and methological approaches adopted in the paper. The third section casts a cursory look at the conceptualisation of poverty in the literature. The fourth section explores poverty‐eradication efforts in Nigeria. The fifth section highlights the failure of previous poverty reduction strategies (PRS) in Nigeria. The sixth section presents a background to MDGs. The seventh section show‐cases application of Islamic economics models (faith‐based model and business system model (BSM)) to MDGs. The eighth section is devoted to data projections, analysis and interpretation. The final section concludes with policy prescriptions.

On the basis of projection which is hinged on Shari'ah assumptions (minimum zakatable wealth and 2.5 per cent Zakat rate), the paper shows that Zakat and Sadaqat collections from year 2009 to 2015 would amount to N357,038 billions and N31 billion, respectively. These funds would go a long way in helping to alleviate poverty and actualisation of MDGs in Nigeria.

The faith‐based poverty reduction strategy enriched by BSM as conceptualised in this study can be used to eradicate extreme poverty and hunger (MDG 1), achieve universal primary education (MDG 2), promote gender equality and empower women (MDG 3), reduce child mortality (MDG 4), improve maternal health (MDG 5), combat, HIV/AIDS, malaria and other diseases (MDGs 6), ensure environmental sustainability (MDG 7) and develop a global partnership for development (MDG 8).

The results of this paper support the Islamic economics view that Zakat and Sadaqat are viable fiscal mechanisms for poverty alleviation where adopted. The FBM as conceptualised in this paper would therefore complement and pose a positive challenge to contemporary PRS in use in many poverty‐ridden nations where economic indicators have justified prevalence of poverty, despite the various PRS put in place by policy makers.

The history of the public enterprise sector in Nigeria is described in some detail, with an emphasis on the steps that have been taken to improve the running of the enterprises since civilian government of the country. In the face of extremely difficult circumstances, including massive devaluation, the country has fought its way back from a position of enormous problems to one of relative economic growth.

Index by subjects, compiled by K.G.B. Bakewell covering the following journals: Facilities Volumes 8‐17; Journal of Property Investment & Finance Volumes 8‐17; Property Management Volumes 8‐17; Structural Survey Volumes 8‐17.