Purpose The purpose of this study is to analyze the mediating effect of human capital in foreign direct investment (FDI) and growth nexus and establish the threshold of human capital in 28 sub-Saharan African (SSA) countries over the period 1999–2017. Design/methodology/approach This study used a secondary source of data obtained from the World Development Indicator and used the system generalized method of moments and dynamic panel threshold regression (TR) to analyze the data. Findings This study found that FDI and human capital have no significant impact on the economic growth in SSA. However, when the interactive term of FDI and human capital was introduced in the model, the economic growth effect of FDI became positive and significant, while the coefficient of the interactive term is negative and significant. This presupposes that SSA does not have a sufficient high-quality workforce that can absorb and transform the spillover benefits of FDI into economic growth. As a result, this study applied the TR to determine the minimum level of human capital and established a threshold level at 63.91%. Practical implications It, therefore, becomes pertinent for policymakers in the SSA region to have a human capital policy to build up their absorptive capacities to fully take advantage of FDI. Originality/value The contribution of this study lies in establishing a threshold of human capital at 63.91% for countries in the SSA region.
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