Department of Economics

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    EFFECT OF DIGITAL INFRASTRUCTURE AND GREEN INNOVATION ON ENVIRONMENTAL OUTCOMES IN SUB-SAHARAN AFRICA
    (Covenant University, Ota, 2026-08) Obi, Chibuzor Happiness; Covenant University Dissertation
    Digital infrastructure has been seen as a force of change for sustainable development, but in Sub-Saharan Africa, the environmental impact of digital infrastructure is poorly understood. This study investigates the impact of digital infrastructure on environmental outcomes in Sub-Saharan Africa, focusing on the potential intermediate path of green innovation, but also identifying threshold conditions where digital growth can foster emissions reductions. The study employs a balanced panel of 40 Sub-Saharan African countries from 2001 to 2022 and uses a dynamic panel-data framework to examine how digital infrastructure is linked to carbon dioxide emissions. It also applies mediation analysis to test whether green innovation mediates the impact of digital infrastructures on environmental outcomes, and threshold analysis to see if such impact is different after a specific level of connectivity is attained. The composite index of key information and communication technology indicators is used to measure digital infrastructure. The main environmental indicator is CO2 emissions per capita, with wider environmental indicators also checked. Renewable energy use as a percentage of total final energy use serves as a proxy for green innovation, as well as renewable electricity output as a percentage of total electricity generation. The study demonstrates that digital infrastructure can have a positive impact on environmental effects, but its effectiveness is conditioned on the quality of connectivity, how much digital infrastructure expansion can foster green innovation, and the availability of cleaner energy systems. An important point to emphasize, however, is the need for suitable green innovation indicators in low-income settings, as traditional use of biomass does not necessarily indicate modern use of clean energy. The study adds to the literature by bringing together direct, mediation and threshold approaches under one umbrella and offers policy recommendations for digital economy planning, climate finance, clean energy investment and sustainability measurement in Sub-Saharan Africa