Evaluating the influence of climate finance on reducing water, energy, and food vulnerabilities driven by climate change in African countries

Climate finance flows disproportionately toward Africa's most climate-exposed economies, yet this targeting rarely yields commensurate reductions in vulnerability, a “targeting-impact paradox” that raises fundamental questions about the effectiveness of global adaptation and mitigation funding. Using an original panel dataset covering 23 African countries from 2000 to 2019, this paper models the joint determination of water, energy, and food (WEF) vulnerabilities and climate finance through a simultaneous-equations framework, estimated via three-stage least squares and two-step efficient IV-GMM. The results show that both global and mitigation-specific climate finance significantly reduce vulnerability, with the strongest effects in food and water systems, yet these gains are neither uniform nor unconditional: they are powerfully mediated by income level, institutional quality, and the tight interdependencies binding the WEF nexus together. Food vulnerability emerges as a critical amplifier of energy and water risk, while energy vulnerability feeds back through food and water systems, revealing a self-reinforcing architecture of risk that undermines siloed policy responses. For African economies confronting escalating climate stress, these findings carry a clear imperative: climate finance can fulfil its transformative promise only where it is deployed through integrated, cross-sectoral strategies explicitly aligned with national development plans and international finance flows, making the coherence of its design as decisive as its volume for building lasting, systemic resilience.