On the asymmetric effect of real exchange rate on growth: Evidence from Africa

Purpose ― This study investigates the asymmetric effect of real exchange rates on the economic growth of twenty African countries for the period 2005 to 2019. Design/Method/Approach ― A refined method of Granger and Yoon (2002) was used to decompose real exchange into appreciation and depreciation. To address the problem of endogeneity and cross-sectional dependence, a two-steps system generalized method of moments, Driscoll-Kraay estimator, and Augmented Mean group were used. Findings ― This study established the presence of asymmetries in the real exchange rate in the region. Further, the study found that real exchange rate appreciation inhibits economic growth while real exchange rate depreciation is beneficial to growth in the region. The results are robust to different estimation techniques. Practical Implications ― The outcome of this study supports the traditional view of exchange rates on macroeconomic variables. Hence, findings from this study can help investors and policymakers in the region to better understand the dynamics of the exchange rate and its effect on economic growth. Originality/Value ― This study enriches the literature on the relationship between exchange rate and growth, especially in Africa using a refined approach to decompose exchange rate into appreciation and depreciation

Crack Mechanism of Different Concrete Grades under Compressive Loading: Application in Rigid Pavement

The growth of cracks in concretes under different loadings in various structures and their consequent diminishing effect on the lifespan of structures is an age long structural problem. This research investigates the influence of compressive loading on the crack mechanism of different concrete grades 1: 1 : 3 (M20), 1: 2: 4 (M15) and 1: 3: 6 (M10) using three brands of cements available in Nigeria namely Dangote (Type A), Elephant (Type B) and Bua (Type C). Particle Size Distribution (PSD), Aggregate Crushing Value (ACV), Aggregate Impact Value (AIV) was carried out on aggregates in accordance with relevant codes while; compressive test were performed on the hardened concrete while, the crack width was measured using microscopic technique. A coefficient of uniformity (Cu) of 4.00, AIV of 46 % and an ACV of 47.7 % were obtained for the aggregate which are suitable for rigid pavements construction. Maximum compressive strength value of 24.96 N/mm2 , 24.67 N/mm2 and 24.89 N/mm2 respectively was obtained for concrete M20 for Type A, Type B and Type C cement at the 28 day. A corresponding crack width of 0.97 mm, 0.89 mm and 0.93 mm was obtained while; a yield period of 57.66 sec, 58.33 sec and 53.33 was obtained respectively. Comparing with the International Organization for Standardization, concrete grade M20 any of the cement types is suitable for the construction of rigid pavements with heavy traffic volume while M15 is recommended for low traffic volume

Market size and foreign direct investment in sub-Saharan Africa: the role of education

This study examines the role of education in the nexus between foreign direct investment (FDI) and market size in sub-Saharan African countries from 2005 to 2015 using a panel of 30 countries. Market size is proxy by gross domestic product and population while two variables are used to measure education; primary school enrolment and secondary school enrolment. Difference Generalised Method of Moments (GMM) is used as the estimation technique. The result shows that education and market size have positive and significant effect on foreign direct investment. The interactive effect of market size (population and gross domestic product) and education (both primary and secondary school enrolment) has positive effect on foreign direct investment. The study concludes that policy maker in the region should focus more on the quality of education rather than quantity of education

Crack Mechanism of Different Concrete Grades under Compressive Loading: Application in Rigid Pavement

The growth of cracks in concretes under different loadings in various structures and their consequent diminishing effect on the lifespan of structures is an age long structural problem. This research investigates the influence of compressive loading on the crack mechanism of different concrete grades 1: 1  : 3 (M20), 1: 2: 4 (M15) and 1: 3: 6 (M10) using three brands of cements available in Nigeria namely Dangote (Type A), Elephant (Type B) and Bua (Type C). Particle Size Distribution (PSD), Aggregate Crushing Value (ACV), Aggregate Impact Value (AIV) was carried out on aggregates in accordance with relevant codes while; compressive test were performed on the hardened concrete while, the crack width was measured using microscopic technique. A Coefficient of uniformity (Cu) of 4.00, AIV of 46 % and an ACV of 47.7 % were obtained for the aggregate which are suitable for rigid pavements construction. Maximum compressive strength value of 24.96 N/mm2, 24.67 N/mm2 and 24.89 N/mm2 respectively was obtained for concrete M20 for Type A, Type B and Type C cement at the 28 day.  A corresponding crack width of 0.97 mm, 0.89 mm and 0.93 mm was obtained while; a yield period of 57.66 sec, 58.33 sec and 53.33 was obtained respectively. Comparing with the International Organization for Standardization, concrete grade M20 any of the cement types is suitable for the construction of rigid pavements with heavy traffic volume while M15 is recommended for low traffic volume

Revitalizing a Traditional Market Space in Ile-Ife, Nigeria: An Analysis of Environmental Quality Indicators and Policy Implications

Traditional market settings in Nigeria have been observed to be poor in environmental quality and less conducive for human physical and economic wellbeing. The physical conditions of the markets have been used to draw conclusions in livability of the space. Policy options to revitalize the overall environmental quality of market spaces require users’ inputs. The study, therefore, examined the environmental quality of a traditional market space in Nigeria, specifically focusing on Odo-Ogbe in Ile-Ife, and explored the potential for policy interventions to revitalize the market. The study was carried out among everyday users of the market. Information obtained through questionnaire administration was the users’ socio-economic backgrounds and twenty-three variables having social, economic and environmental characteristics. Physical observation was also carried out for an all-inclusive environment assessment of the market. Using systematic random and purposive sampling techniques, 119 market users were selected for the survey. Results showed that, the majority of the users were married (64.7%), females (74.8%), who had one form of educational qualification or the other (89.9%). Using an index tagged “Users’ Environmental Quality Index” (UEQI), sixteen environmental quality indicators were rated to be important. Among these were “availability of electricity (UEQI=4.68)”, “availability of water (UEQI=4.52)”, and “clean and healthy environment (UEQI=4.18)”. The study recommended that the government concerned with city administration should pull financial and human resources together to provide facilities and services related to users’ environmental quality indicator data for effective revitalization of the market space

Evaluation of patients with suspected obstructive sleep apnea in a low-middle income country: Lagos experience

Obstructive sleep apnea (OSA) is a common chronic disorder that decreases the quality of life of patients. It is an underdiagnosed medical condition in Nigeria. This study aimed to describe the clinical presentations and validate the sleep apnea screening questionnaires with a home sleep study for the diagnosis of patients with suspected OSA seen in Lagos. This was a descriptive cross sectional study carried out on adult patients with suspicion of OSA referred to the Respiratory Clinic of Lagos State University Teaching Hospital. A proforma was used to obtain information and also data from home polysomnography was obtained for each patient. We selected 22 patients. The commonest presentations include snoring (20 or 90.9%), daytime somnolence (16 or 72.7%) and choking while sleeping (12 or 54.5%). The commonest comorbidities were hypertension (16 or 72.7%) and obesity (6 or 27.3%). The STOP-Bang  score identified more patients with a high clinical probability for OSA than the Epworth score (20 and 12 patients respectively). Polysomnography showed evidence of sleep apnea in most suspected patients with severity ranging from mild, to moderate to severe disease (3 or 13.6%, 3 or 13.6%, and 10 or 45.5% respectively). The use of combined Epworth and STOP-Bang questionnaires combination is great tool in identifying patients with suspected cases of OSA based on clinical presentations that will eventually benefit in a resource-limited environment like Lagos. There should be increased awareness of the use of this readily available and cheap questionnaire among physicians in Lagos for ease of OSAS diagnosis for many patients

Access to Finance, Indigenous Technology and Food Security in Nigeria: Case Study of Ondo Central Senatorial District

Research purpose: Food security remains a major component of economic development. Many developing nations are facing challenges of food insecurity, which had contributed to starvation and other societal problems. With adequate food intake, human healthy living is assured. This study investigates the impact of access to formal finance and indigenous technology and knowledge on food security in Ondo central senatorial district in Ondo state, Nigeria

Foreign direct investment and poverty reduction in sub-Saharan Africa: does environmental degradation matter?

Abstract This paper investigates the threshold effect of environmental degradation on the FDI-poverty nexus in sub-Saharan Africa for the period 1986–2018. The study used panel threshold regression for the empirical analysis. The evidence from threshold regression using different measures of poverty and environmental degradation shows that the poverty reduction effect of FDI is not eroded by environmental degradation. The study found overwhelming evidence that at the higher level of environmental degradation, FDI contributes significantly to poverty reduction except when Household final consumption is used to proxy poverty and FDI produces an insignificant effect on poverty reduction at the higher level of methane emissions and nitrous oxide emission. Based on this finding, any attempts to reduce environmental degradation by reducing the inflow of FDI will worsen poverty rates in the region

Monetary Policy Shocks and Industrial Output in Nigeria: A Dynamic Effect

The study examines the dynamic effect of positive and negative monetary policy shocks on industrial output in Nigeria. Quarterly secondary data covering the period from 1986 to 2015 were used for the study. Applying Autoregressive Distributed Lag (ARDL), the results shows that both negative monetary policy shocks and positive monetary policy shocks have negative effect on industrial output in Nigeria both in the short run and in the long run. The study recommend that monetary policy should the used with caution in Nigeria