Abstract
While both theory and empirical evidence have established the critical role of digital infrastructure
in promoting innovation, there needs to be more understanding of factors mediating this
nexus, especially from the African context, which is understudied. This paper argues that digital
infrastructure spurs innovation, but the overall effect depends on countries’ level of human
capital. Relying on data from 28 African countries spanning 2011–2019 and the system Generalized
Method of Moment (GMM) estimator, this study departs from the extant literature by
examining the synergistic effect of digital infrastructure and human capital on innovation while
placing much emphasis on the multidimensional measurement approach of digital infrastructure.
The results show a positive relationship between digital infrastructure and innovation in Africa.
Furthermore, the interactive effect of digital infrastructure and human capital is significantly
related to innovation, implying that digital infrastructure can indirectly enhance innovation
through human capital accumulation. To promote innovation, the study recommends that policies
that improve digital infrastructure should be pursued simultaneously with policies that enhance
human capital.