📈 economics

Transforming Finance for Sustainable Development in Sub-Saharan Africa: Financial Inclusion, Digitalisation, and Institutional Quality

This study analyzes panel data from Sub-Saharan Africa (2011–2024) to demonstrate that while financial development initially intensifies environmental pressures, its capacity to drive sustainable outcomes—such as reduced carbon emissions and improved energy access—is significantly enhanced when accompanied by financial inclusion, digitalisation, and high institutional quality beyond specific maturity thresholds.

Original authors: Lukman Raimi, Ridwan Ibrahim, Kazeem Bello AJIDE, Abdul Rahman Bin S Senathirajah, Sayeeduz Zafar Qazi, Rasheedul Haque

Published 2026-10-27

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CC BY 4.0

Original authors: Lukman Raimi, Ridwan Ibrahim, Kazeem Bello AJIDE, Abdul Rahman Bin S Senathirajah, Sayeeduz Zafar Qazi, Rasheedul Haque

Original paper licensed under CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). ✨ This is an AI-generated explanation of the paper below. It is not written or endorsed by the authors. For technical accuracy, refer to the original paper. Read full disclaimer

For decades, the prevailing belief among economists and policymakers has been straightforward: if a country builds a stronger financial system, its economy will grow, and that growth will eventually solve its problems. The logic was that more banks, more loans, and more money flowing through the economy would naturally lead to better lives and, eventually, a cleaner environment. However, this assumption overlooks a crucial reality in many developing regions. In places like Sub-Saharan Africa, where energy poverty is widespread and climate change poses an immediate threat, simply adding more money to the system does not guarantee a greener future. In fact, without careful guidance, that extra money might just fund more factories and machines that pollute the air, locking the region into a cycle of dirty growth. The question facing researchers today is not just whether finance can grow an economy, but whether it can be transformed to grow a sustainable one.

A team of researchers set out to investigate this exact puzzle across Sub-Saharan Africa, examining how the region's financial systems interact with its environment over time. They looked at data from 2011 to 2024, a period that saw a massive surge in mobile money and digital banking across the continent. Instead of treating finance as a single, static thing, they broke it down into three distinct parts: the sheer size of the banking sector, how many ordinary people actually have access to it, and how much the system relies on digital technology. They also measured the quality of local institutions—the rules, regulations, and government effectiveness that determine how money is actually used. By tracking these factors against three key outcomes—carbon emissions, the use of renewable energy, and access to electricity—they sought to understand if the region's financial evolution was helping or hindering its path toward a sustainable future.

The study reveals a story that is far more complex than a simple cause-and-effect relationship. The researchers found that in the early stages of financial expansion, the results are often counterintuitive. When a country simply increases the amount of credit available to businesses and individuals, it initially leads to higher carbon emissions. This happens because new money tends to flow toward established, carbon-intensive industries and infrastructure projects that drive immediate economic activity but damage the environment. It is only after a financial system reaches a certain level of maturity and depth that this trend begins to reverse. Once the system is robust enough, further growth starts to reduce emissions and encourage the adoption of cleaner energy sources. This suggests that the relationship between finance and the environment is not a straight line; it is a curve where the benefits of sustainability only appear after the system has grown large and sophisticated enough to support them.

However, the size of the financial system is only part of the story. The researchers discovered that who gets access to money and how they access it matters just as much as the total amount available. They found that financial inclusion—the ability for ordinary households and small businesses to open accounts and save money—is consistently linked to better environmental outcomes. When more people are brought into the formal financial system, they are better able to invest in renewable energy and improve their energy access. Even more powerful is the role of digitalisation. The study highlights that the shift toward digital finance, such as mobile money transactions, is a strong driver of sustainability. Digital systems reduce the costs and barriers to moving money, making it easier for people to pay for clean energy solutions and for businesses to adopt efficient technologies. In the data, digitalisation showed the strongest positive effect, helping to lower emissions and increase the use of renewable power across the region.

Yet, none of these factors work in a vacuum. The most critical finding of the study is that the quality of local institutions acts as a gatekeeper for these positive changes. The researchers identified a specific threshold of institutional quality—a point where government regulations and governance become strong enough to change the outcome. Below this threshold, even a growing financial system tends to reinforce environmental damage. But once a country crosses this line of institutional strength, the same financial growth begins to support sustainability. Strong institutions ensure that money is directed toward green projects rather than polluting ones. Without this foundation of good governance, the potential benefits of financial inclusion and digitalisation remain out of reach.

Ultimately, the research suggests that the path to a sustainable future in Sub-Saharan Africa does not lie in simply expanding the banking sector. It requires a deliberate transformation of how finance works. The evidence points to a need for policies that prioritize making financial services accessible to everyone, accelerating the shift to digital platforms, and, most importantly, strengthening the rules and institutions that guide how that money is spent. The study concludes that while financial growth is necessary, it is not sufficient on its own. True sustainability will only be achieved when the financial system evolves into an inclusive, digital, and well-governed engine that actively directs resources toward a cleaner, more resilient future.

Technical Summary: Transforming Finance for Sustainable Development in Sub-Saharan Africa

1. Problem Statement and Research Context

The paper addresses the critical ambiguity surrounding the relationship between financial system expansion and sustainable development in Sub-Saharan Africa (SSA). While traditional economic logic posits financial development as a catalyst for growth and resource allocation, emerging evidence suggests it may simultaneously reinforce carbon-intensive production structures. The authors argue that existing literature often treats the finance–environment nexus as a linear, static relationship, overlooking the potential for nonlinear transitions where financial systems evolve from intensifying environmental pressure to supporting sustainability outcomes.

Furthermore, the study identifies a gap in understanding how broader dimensions of financial transformation—specifically financial inclusion and digitalisation—interact with institutional quality to shape sustainability. In the SSA context, characterized by energy poverty, financial exclusion, and rapid mobile-money adoption, it remains unclear whether financial expansion alone can drive transitions toward cleaner energy and reduced emissions, or if these outcomes are contingent upon specific governance thresholds and structural maturation.

2. Methodology and Data Strategy

The study employs a comprehensive econometric approach using an unbalanced panel of selected SSA economies from 2011 to 2024. The data is sourced from the World Development Indicators (WDI), Global Findex, IMF Financial Access Survey (IMF-FAS), and Worldwide Governance Indicators (WGI).

Variables

Dependent Variables (Sustainability Transitions): Carbon dioxide emissions (CO₂), renewable energy consumption (REN), and access to electricity (ELEC).
Core Explanatory Variables (Financial Transformation):
- Financial Development (FD): Measured by domestic credit to the private sector (% of GDP), including a squared term ( $FD^2$ ) to test for nonlinear threshold effects.
- Financial Inclusion (INC): Proxied by mobile money accounts per 1,000 adults.
- Digitalisation (DIG): A composite index of internet users, mobile subscriptions, and mobile money transactions.
Conditioning Variable: Institutional Quality (IQ), proxied by the regulatory quality index.
Controls: GDP per capita, trade openness, human capital, and urbanisation.

Estimation Strategy

To address cross-sectional dependence, slope heterogeneity, and mixed integration orders (I(0) and I(1)), the study utilizes four complementary estimators:

Cross-Sectionally Augmented Autoregressive Distributed Lag (CS-ARDL): To estimate short-run and long-run dynamics while controlling for common shocks.
Dynamic Common Correlated Effects Mean Group (DCCE-MG): To ensure robustness against unobserved common factors and heterogeneous country responses.
Method of Moments Quantile Regression (MMQR): To examine heterogeneous effects across the distribution of sustainability outcomes (from low to high performance).
Dynamic Panel Threshold Model (DPTM): To identify critical institutional quality thresholds ( $\gamma$ ) that determine regime shifts in the finance–sustainability relationship.

3. Key Empirical Results

Nonlinear Dynamics of Financial Development

The analysis reveals a nonlinear relationship where financial development initially intensifies environmental pressure before improving sustainability outcomes beyond specific maturity thresholds.

Initial Stage: Financial expansion initially intensifies environmental pressure, increasing carbon emissions and reducing renewable energy adoption and electricity access. This suggests that early-stage financial deepening supports carbon-intensive industrialisation.
Threshold Effect: Beyond identifiable maturity thresholds, the adverse effects diminish and reverse. The squared term ( $FD^2$ ) becomes significant and negative for emissions, indicating that mature financial systems begin to facilitate sustainable transitions.

The Role of Inclusion and Digitalisation

Unlike financial depth, financial inclusion and digitalisation exhibit consistently positive sustainability effects across all estimators.

Financial Inclusion: Higher inclusion reduces carbon emissions and significantly increases renewable energy consumption and electricity access.
Digitalisation: Demonstrates the strongest positive effects, reducing emissions and accelerating the adoption of renewable energy and electricity access. This highlights the capacity of digital ecosystems to overcome traditional infrastructure barriers.

Institutional Conditioning and Thresholds

Institutional quality acts as a critical moderator.

Interaction Effects: Stronger institutions amplify the sustainability benefits of both financial development and digitalisation.
Threshold Analysis: The DPTM identifies a critical institutional quality threshold at approximately -0.38.
- Below Threshold ( $IQ \leq -0.38$ ): Financial development significantly increases carbon emissions.
- Above Threshold ( $IQ > -0.38$ ): The adverse effects of financial expansion weaken, and the nonlinear transition toward sustainability accelerates. Strong governance is thus a prerequisite for finance to become a sustainability tool.

Heterogeneity (MMQR Findings)

The effects of financial transformation are not uniform. The MMQR results indicate that the sustainability benefits of inclusion and digitalisation are more pronounced in countries with higher environmental pressure (upper quantiles of emissions). Similarly, the positive impact of institutional quality strengthens as sustainability challenges intensify.

4. Key Contributions

The paper claims four primary contributions to the literature:

Conceptual Shift: It advances a "financial transformation" perspective, reconceptualizing finance not as a static measure of depth but as a multidimensional system involving inclusion, digitalisation, and institutional conditions.
Nonlinearity and Thresholds: It moves beyond linear assumptions by identifying specific institutional thresholds that determine whether financial expansion reinforces environmental degradation or supports sustainability transitions.
Integration of Dimensions: It systematically integrates financial inclusion and digitalisation into sustainability analysis, highlighting their distinct roles in low-income settings where traditional banking is limited.
Regional Focus: It addresses the empirical gap regarding SSA, a region characterized by high climate vulnerability and rapid digital financial innovation, providing evidence that sustainability transitions depend on the quality and structure of finance rather than mere expansion.

5. Significance and Policy Implications

The authors conclude that financial development alone does not guarantee sustainability gains. The study argues that sustainability transitions in SSA depend less on expanding the scale of finance and more on transforming financial systems into inclusive, digitally enabled, and institutionally supported architectures.

Policy Implications derived from the findings include:

Prioritizing Transformation over Expansion: Policymakers should move beyond goals of increasing financial depth alone and focus on directing resources toward sustainable sectors through green finance mechanisms.
Inclusion as an Instrument: Expanding access via mobile money and digital banking should be viewed as a direct sustainability strategy to improve resilience and renewable energy adoption.
Institutional Prerequisites: Institutional strengthening (regulatory quality and governance) is identified as a necessary condition. Without crossing the institutional threshold, financial expansion may continue to reinforce carbon-intensive growth.
Integrated Approaches: Isolated interventions are deemed insufficient; coordinated strategies linking financial development, digitalisation, and institutional reform are required to achieve SDG 7 (Clean Energy) and SDG 13 (Climate Action).

The paper maintains a modest stance, acknowledging limitations such as the use of aggregate country-level data and the observational nature of the causal inference, suggesting that future research could employ micro-level data to further dissect these dynamics.