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There is proliferation of regulatory frameworks and guidelines globally to implement social considerations in the procurement of construction projects. However, there are scanty empirical studies that have researched into the implementation of social consideration in the procurement of construction projects in Africa, particularly Ghana. Therefore, this study aims to examine the challenges that hinder the implementation of social value in the procurement of construction works in Ghana.

The study used an explanatory sequential mixed-methods design with an initial quantitative instrument phase, followed by a qualitative data collection phase. A critical comparative review of the related literature resulted in the identification of 29 challenges. A total of 100 questionnaire responses from professionals in the construction industry in Ghana based on the challenges on the implementation of social value were retrieved. The data obtained were coded with SPSS version 22, analysed descriptively (mean scores and standard deviation) and via inferential analysis (exploratory factor analysis). These data were then validated through semi-structured interviews with 10 professionals. The data obtained from the semi-structured validation interviews were analysed through the side-by-side comparison of the qualitative data with the quantitative data.

The results revealed that the critical challenges to the implementation of social value in the procurement of construction works can be clustered into three major components, i.e. weak processes and bureaucracy, the incongruence of social value with the traditional procurement process, and the misaligned social targets and erosion of public procurement principles. The interviewees agreed to and confirmed the criticality of these factors as challenges to the implementation of social value in the procurement of construction works.

A substantial number of studies have identified numerous challenges to the implementation of social value. This study presents a major cluster of challenges to the implementation of social value. Social value through construction procurement is a strategic tool globally and Ghana can leverage on its multiplier effects for social development.

The study extends the global discourse on social value in construction management literature by providing empirical evidence on the cluster of challenges that have the potential to hinder the implementation of social value in the procurement of construction works.

This study explores the importance of and vulnerabilities in deploying physical access control (PAC) devices in a typical university setting.

The study adopts face-to-face and telephone interviews. This study uses a semi-structured interview guide to solicit the views of 25 interviewees on the subject under consideration. Qualitative responses to the interview are thematically analyzed using NVivo 11 Pro analysis application software.

The findings reveal five importance and seven vulnerabilities in the deployment of PAC devices in the institution. Key among the importance of deploying the devices are “prevent unwanted premise access or intrusions,” “prevent disruptions to university/staff operations on campus” and “protect students and staff from outside intruders.” Key among the identified vulnerabilities are “tailgating”, “delay in emergent cases” and “power outage may affect its usage.”

This study offers insight into a rare area of study, especially in the Sub-Saharan Africa region. Furthermore, the study contributes to the state-of-the-art importance and vulnerabilities in deploying PAC devices in daily human activities. The study is valuable in that it has the potential to establish a foundation for future studies that may delve into investigating issues associated with the deployment of PAC devices.

Quality environment is argued to be essential for ensuring food security. The effect of environmental degradation on agriculture has thus gained the attention of researchers. However, the analyses of aggregate and sectoral effect of carbon dioxide emissions on agricultural development are limited in the literature. Consequently, this study examines the effect of aggregate and sectoral carbon emissions on Ghana's agricultural development.

Time-series data from 1971 to 2017 are employed for the study. Regression analysis and a variance decomposition analysis are employed in the study.

The results show that the country's agricultural development is negatively affected by aggregate carbon emission while financial development, labour and capital increases agricultural development. Further, industrial development and emissions from transport sector, industrial sector and other sectors adversely affect Ghana's agriculture development. The contribution of carbon emission together with other explanatory variables to the changes in agricultural development generally increases over the period.

This study analyses the aggregate and sectoral carbon dioxide emission effect on Ghana's agricultural development.