Private-Public Partnership Financing and Infrastructure Development in Sub-Saharan Africa

Sub-Saharan Africa (SSA) has a severe infrastructure shortfall of about $100 billion per annum, which has stifled economic growth, poverty alleviation and sustainability. To fill this gap, governments have developed Private–Public Partnerships (PPPs) to harness the private sector's efficiency, innovation, and capital while ensuring public-sector oversight and a social purpose. Nonetheless, institutional frailty, political turmoil, regulatory vagueness, and the absence of financial depth continue to limit the application of PPP in SSA. This paper examines the association between PPP financing mechanisms and resulting infrastructure development in SSA countries, using a quantitative research design. Structured questionnaires were used to collect data on 127 infrastructure professionals, policymakers, and development finance experts in 15 SSA countries. The paper uses Partial Least Squares Structural Equation Modelling (PLS-SEM) to test the hypothesised relationships among institutional quality, regulatory frameworks, financing structures, risk allocation mechanisms, stakeholder engagement, and the outcomes of infrastructure development. Findings also show that institutional quality (0.342, p < 0.001) and the effectiveness of the regulatory framework (0.289, p < 0.01) are the strongest predictors of successful PPP implementation. Moreover, risk allocation mechanisms play a significant mediating role in the relationship between financing structures and project outcomes (β = 0.256, p < 0.01). The research adds value to the PPP theory by integrating institutional economics, transaction cost economics, and stakeholder theory into a single framework for understanding infrastructure financing in developing environments. In practice, such results indicate that SSA governments must focus on institutional capacity building, introduce transparent regulatory systems, introduce mechanisms for risk sharing that would attract private-sector investment without jeopardising the interests of the population, and enhance stakeholder engagement processes. Policymakers should develop a standardised PPP framework that allows for some adaptation to local circumstances.