Analysis of key determinants of investment spending in South Africa and Nigeria
Maphutha, Molebogeng Makididi
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This study examined the comparative analysis of key determinants of investment spending in South Africa and Nigeria for the period January 2003 to December 2015. The sluggish growth of investment spending in South Africa and Nigeria was investigated using the following determinants (lending rate, price level, real effective exchange rate, gross domestic product, savings, and country risk and trade openness). Conceptualisation of investment spending was analysed, the definition and the importance of both the investment and investment spending, as well as the types of investment were discussed.. The study focused and discussed the theories that are essential for investment spending (Harold-Domar growth model, the accelerator theory, neoclassical theory and Q theory). The autoregressive distributed lag model (ARDL) was employed as the cointegration method to analyse the interaction between investment spending and different determinants employed for the study. The long-run relationship in South Africa, showed positive relationships exist between gross fixed capital formation (investment spending) and lending rate, GDP and savings, while price level, real effective exchange rate, country risk and trade openness have negative impacts. As compared to Nigeria, lending rate, GDP, savings, country risk and trade openness have a long-run effect on gross fixed capital formation. The short-run analysis found that Nigeria indicates a more rapid adjustment to equilibrium than South Africa. The only determinant that has short-run effect in both countries is GDP. The study concludes that mostly lending rate, low savings and GDP affect gross fixed capital formation in South Africa and Nigeria.