Corruption Control Key to Turning Nigeria’s Public Debt into Infrastructure Gains, Study Finds
A new study by Ogu Callistus, Akamike Okechukwu Joseph, and Ihesie Ugochukwu Peter shows that improving corruption control—not simply increasing public borrowing—is the most reliable driver of infrastructure spending in Nigeria. The research, conducted by economists from Imo State University and Kingsley Ozumba Mbadiwe University and published in 2026 in the International Journal of Applied Economics, Accounting and Management (IJAEAM), analyzed national fiscal and governance data from 1996 to 2024. The findings matter for policymakers because Nigeria’s public debt has grown rapidly in recent years, yet infrastructure gaps remain widespread.
Rising Debt, Persistent Infrastructure Gaps
Nigeria has significantly expanded public borrowing over the past decade to finance development priorities such as roads, electricity, and water systems. By the end of 2024, total public debt reached approximately ₦144.66 trillion. Despite this increase, many infrastructure projects continue to face delays, cost overruns, or incomplete implementation.
The study highlights a central policy question: does borrowing automatically translate into improved infrastructure? The answer, according to the researchers, depends largely on governance quality—especially the ability to control corruption.
Infrastructure investment plays a critical role in economic growth, job creation, and public service delivery. However, weak project selection systems, procurement inefficiencies, and limited accountability can reduce the effectiveness of debt-financed development programs.
How the Researchers Studied Nigeria’s Debt and Infrastructure
The research team analyzed annual national data covering the period 1996–2024 using a quantitative time-series approach.
Key features of the methodology include:
- Data sourced from Nigeria’s Debt Management Office, Central Bank of Nigeria, National Bureau of Statistics, and World Bank governance indicators
- Infrastructure delivery measured through government capital expenditure
- Debt financing evaluated using total public debt stock and annual debt servicing costs
- Governance quality assessed through government effectiveness and control of corruption indicators
- Statistical modeling conducted using the Autoregressive Distributed Lag (ARDL) approach to examine both long-term and short-term relationships
This approach allowed the researchers to determine whether borrowing and governance factors influence infrastructure investment over time.
Key Findings: Debt Alone Does Not Guarantee Infrastructure Growth
The study produced several important results that reshape how policymakers should think about borrowing and development financing.
Main findings include:
- Total public debt showed a positive but statistically weak relationship with infrastructure spending.
- Debt servicing obligations had a small negative effect, suggesting repayment pressures can reduce investment capacity.
- Government effectiveness showed no significant long-term influence on infrastructure delivery.
- Control of corruption had a strong and statistically significant positive impact on infrastructure investment outcomes.
The results confirm that governance quality—particularly transparency and accountability—plays a decisive role in ensuring borrowed funds translate into real infrastructure improvements.
The statistical model also showed that fiscal and governance variables maintain a stable long-term relationship with infrastructure spending, with about 51% of short-term imbalances adjusting back toward long-term equilibrium each year.
Why Corruption Control Matters More Than Borrowing Levels
One of the most striking conclusions from the research is that improving corruption control produces stronger infrastructure results than simply increasing debt.
Periods with stronger anti-corruption performance were consistently associated with higher levels of government capital expenditure. This suggests that better oversight helps ensure borrowed resources are directed toward productive investments rather than inefficiencies or leakages.
As the authors explain, strengthening accountability systems can significantly improve the effectiveness of public borrowing:
According to economists Ogu Callistus and colleagues at Imo State University and Kingsley Ozumba Mbadiwe University, improvements in corruption control significantly increase infrastructure delivery by ensuring public funds are used transparently and efficiently.
This finding reinforces the idea that governance reforms and fiscal policy must work together to support development.
Implications for Policymakers and Development Partners
The study offers practical recommendations for government agencies, development institutions, and economic planners.
Policy implications include:
- Strengthening project selection systems before new borrowing decisions are made
- Linking borrowing more closely to productive infrastructure investments
- Managing debt servicing costs to avoid crowding out capital expenditure
- Expediting procurement reforms and institutional capacity improvements
- Expanding anti-corruption monitoring mechanisms across infrastructure programs
These steps could improve the effectiveness of debt-financed development projects across sectors such as transportation, power generation, water supply, and housing.
International development partners may also benefit from the findings when evaluating Nigeria’s fiscal sustainability and institutional performance.
Broader Lessons for Emerging Economies
Although the study focuses on Nigeria, the findings are relevant to many developing countries experiencing rising public debt alongside infrastructure shortages.
The research demonstrates that borrowing alone does not guarantee development outcomes. Instead, institutional quality determines whether public debt becomes a tool for growth or a fiscal burden.
Countries seeking to expand infrastructure investment through borrowing may need to prioritize governance reforms alongside financial strategies.
Author Profile
Ogu Callistus holds a degree in Economics and is a researcher in public finance and development economics at Imo State University, Nigeria.
Akamike Okechukwu Joseph is an economist at Imo State University specializing in macroeconomic policy and fiscal sustainability.
Ihesie Ugochukwu Peter is a lecturer in Economics at Kingsley Ozumba Mbadiwe University with research interests in governance and infrastructure finance.
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