Public–Private Partnerships and Financial Performance of Infrastructure Projects

Abstract

Public–Private Partnerships (PPPs) have emerged as a central mechanism for financing infrastructure amid fiscal constraints, yet evidence on their financial performance remains mixed and insufficiently explained at the project level. This study examines how PPP project structure influences the financial performance of infrastructure projects, with particular emphasis on the mediating role of risk allocation and sectoral heterogeneity. Adopting a layered mixed-methods design, the study combines project-level panel data analysis with a structured risk allocation assessment, complemented by embedded case studies and comparative sector analysis. Using longitudinal data on PPP projects across transport, energy, water, and social infrastructure sectors, the empirical analysis employs fixed-effects panel models, mediation specifications, and sector interaction terms to capture performance dynamics over time. The findings show that PPP project structure—especially private capital participation and availability-based payment mechanisms—has a positive and statistically significant effect on financial performance, proxied by debt service coverage and profitability indicators. Importantly, risk allocation efficiency partially mediates this relationship, confirming that balanced risk sharing enhances revenue stability and debt sustainability. Sectoral results reveal pronounced heterogeneity, with transport projects being more sensitive to demand risk and social and energy infrastructure benefiting from revenue-stabilising contractual arrangements. By moving beyond aggregate analyses and explicitly modelling risk allocation as a mechanism, the study advances PPP and project finance literature and offers practical insights for policymakers, PPP units, investors, and lenders seeking to improve the financial sustainability of infrastructure partnerships.