ABSTRACT
This study examines the impact of public debt management on economic growth in Nigeria over the period 1980–2024. The persistent increase in Nigeria’s public debt profile and the rising cost of debt servicing have raised concerns about debt sustainability and its implications for economic growth. The study focuses on key debt management indicators, including external debt, domestic debt, debt servicing, interest rate, and inflation, and how they influence economic growth, proxied by Real Gross Domestic Product (RGDP). The study adopts an ex-post facto research design and employs a time-series approach using secondary data sourced from the Central Bank of Nigeria (CBN), Debt Management Office (DMO), National Bureau of Statistics (NBS), World Bank, and International Monetary Fund (IMF). The Ordinary Least Squares (OLS) estimation technique is used to analyze the relationship between debt management variables and economic growth in Nigeria. The empirical findings reveal that external debt and debt servicing exert a negative effect on economic growth, indicating that excessive reliance on external borrowing and high debt servicing obligations constrain economic performance. Conversely, domestic debt shows a positive but varying impact on economic growth, suggesting that domestic borrowing can support growth when effectively managed and channeled into productive sectors. Interest rate and inflation are found to negatively affect economic growth, reflecting macroeconomic instability and high cost of borrowing. The study concludes that while public debt can promote economic growth, poor debt management practices, rising debt servicing costs, and inefficient utilization of borrowed funds undermine Nigeria’s growth prospects. The study therefore recommends that policymakers strengthen debt management strategies, prioritize concessional borrowing, reduce excessive debt servicing burdens, and ensure that borrowed funds are invested in productive and growth-enhancing sectors of the economy to achieve sustainable economic growth.
Keywords: Public Debt, Debt Management, Economic Growth, External Debt, Domestic Debt, Debt Servicing, Nigeria.
TABLE
OF CONTENTS
TITLE PAGE………………………………………………………………………..i
DECLARATION……………………………………………………………...……ii
CERTIFICATION……………………………………………………………...….iii
DEDICATION………………………………………………………………...…...iv
ACKNOWLEDGEMENT……………………………………………………….…v
TABLE OF
CONTENTS……...…………………………………………………viii
ABSTRACT………..……………………………………………………………xiii
LIST OF TABLES ……………..…………………………………………………vi
CHAPTER ONE: INTRODUCTION
Background of the
Study………………………………………………………… 1
Statement of the Problem………………………………………………………… 3
Research Questions…………………………………………………………………5
Aims and Objectives of the Study………………………………………………… 5
Significance of the Study………………………………………………………… 5
Scope of the Study………………………………………………………………… 6
Organization of the Study………………………………………………………… 6
Definition of Key Terms…………………………………………………………… 7
CHAPTER TWO
LITERATURE REVIEW
2.1
Introduction………………………………………………………………… 9
2.2 Conceptual Literature………………………………………………………… 9
2.2 Concept of Value Added Tax (VAT)……………………………………… 15
2.3 Theoretical Literature……………………………………………………… 16
2.4 Empirical Literature………………………………………………………… 19
2.5 Overview of VAT in Nigeria………………………………………………… 20
2.5.1 Overview of non-oil tax revenue and economic growth in Nigeria ……… 28
2.6 Theoretical Framework…………………………………………………… 29
2.7 Research Gaps……………………………………………………………… 30
CHAPTER
THREE: METHODOLOGY
3.1 Introduction……………………………………………………………………34
3.2 Methods and Sources of Data Collection……………………………………..34
3.3 Estimation Techniques……………………………………………………… 35
3.3.1 Descriptive statistic ………………………………………………………… 35
3.3.2 Stationarity Tests (Unit Root Test)……………………………………… 36
3.3.3 Co-integration Test…………………………….…………………………… 36
3.3.4 Ordinary Least Squares (OLS) and Autoregressive Distributed Lag (ARDL). 36
3.4
Model Specification………………………………………………………… 36
3.5 A Priori Expectation………………………………………………………… 38
3.6 Analytical Techniques………………………………………………………… 39
CHAPTER FOUR: DATA PRESENTATION AND ANALYSIS
4.1
Introduction………………………………………………………………… 42
4.2 Descriptive Statistics………………………………………………………… 43
4.3 Unit Root Test Results……………………………………………………… 44
4.4 Optimal Lag Length Selection……………………………………………… 46
4.5 ARDL Bound Co-integration Test Results…………………………………… 46
4.6 ARDL Test Results (Short-run and Long-run)……………………………… 46
4.7 Results and Discussion……………………………………………………… 50
4.8 Diagnostic Test Results……………………………………………………… 50
4.8.4 Stability Test………………………………………………………………… 51
CHAPTER FIVE: SUMMARY, CONCLUSION AND
RECOMMENDATION
5.1 Summary of Major
Findings………………………………………………… 52
5.2 Conclusion…………………………………………………………………… 53
5.3
Recommendations……………….…………………………………………… 54
REFERENCES……………..…………………………………………………… 55
APPENDIX
I:MICROECONOMICS DATA ……………….…………… 58
APPENDIX
II UNIT ROOTS TESTS………………………………………… 59
APPENDIX
III ARDL SHORTRUN
TEST.…………………..….…..……… 63
APPENDIX IV: ARDL LONG-RUN AND BOUND TEST.……..…….…… 67
LIST
OF TABLES
Table 4.1 Descriptive Statistics of
Variables……………………………...……… 40
Table 4.2 Augmented Dickey–Fuller (ADF) Test
Result………………………… 41
Table 4.3 Optimal Lag Length Selection
Criteria………………………………… 42
Table 4.4 ARDL Bound Test Result for
Co-integration………………………..… 43
Table 4.5(a) ARDL Test Result
Short–Run……………………………………… 44
Table 4.5(b) ARDL Test Result
Long–Run…………………………………….… 44
Table 4.6(a) Normality (Jarque–Bera Test
Statistic)…………………………… 46
Table 4.6(b) Serial Correlation (Breusch–Godfrey LM
Test)………………… 47
Table 4.6(c)
Heteroskedasticity Test (Breusch–Pagan–Godfrey)…………… 47
CHAPTER ONE
1.0 Introduction
Debt management refers to the process by which a country
organizes, monitors, and controls its debt obligations. It includes decisions
regarding the composition, tenure, and cost of debt, both domestic and
external. In Nigeria, debt accumulation has been a major tool for financing
deficits, infrastructure, and development projects. However, poor debt
management practices have often led to unsustainable debt burdens, crowding out
investments and hindering growth.
It often contains complex financial structures and
can create substantial balance-sheet risk for the government. Large and poorly
structured debt portfolios also make governments more vulnerable to economic
and financial shocks and have often been a major factor in economic crises.
Recognizing the important role that public debt management can play in helping
countries cope with economic and financial shocks, the International Monetary
and Financial Committee (IMFC)1 requested that staff from the International
Monetary Fund and World Bank work together in cooperation with national debt
management experts to develop a set of guidelines on public debt management to
assist countries in their efforts to reduce financial vulnerability. The IMFC’s
request, which was endorsed by the Financial Stability Forum, was made as part
of a search for broad principles that could help governments improve the
quality of their policy frameworks for managing the effects of volatility in
the international monetary and financial system. By involving national debt
management authorities in the preparation of the guidelines, the process sought
to strengthen countries’ sense of ownership of them and helped to ensure that
they are in line with sound practice. Government debt managers from about 30
countries provided input to an initial draft that was discussed by the
Executive Boards of the IMF and World Bank in July 2000. Following these
discussions, more than 300 representatives from 122 countries attended five
outreach conferences on the guidelines in Abu Dhabi, United Arab Emirates; Hong
Kong Special Administrative Region; Johannesburg, South Africa; London, United
Kingdom; and Santiago, Chile.2 The feedback provided was taken into account in
the final version that was approved by the Executive Boards of the two
institutions in March 2001, and endorsed by the IMFC and the Development
Committee at their meetings in April 2001.
1.1 Background of the Study
Since the 1980s, Nigeria has faced increasing debt
challenges, culminating in the 2005 Paris Club debt relief. Despite this, new
borrowings have continued, raising concerns about sustainability. Debt
management's impact on economic growth involves how effectively the borrowed
funds are used to stimulate GDP, create jobs, improve infrastructure, and
enhance human capital development.
1.2 Statement of the Problem
Nigeria, like many developing nations, relies
heavily on both domestic and external borrowing to finance budget deficits,
infrastructure projects, and developmental programs. While debt can catalyze
economic growth when properly managed and channeled into productive ventures,
poor debt management often leads to unsustainable debt burdens, crowding out of
private investment, and macroeconomic instability.
Over the years, Nigeria’s rising debt profile has
become a source of concern, as the cost of servicing debts continues to consume
a significant portion of government revenue. This reduces the fiscal space
available for investment in critical sectors such as education, health, and
infrastructure sectors necessary for sustainable economic growth. Furthermore,
cases of mismanagement, corruption, and diversion of borrowed funds have
weakened the potential benefits of debt financing.
Despite several policy reforms and debt
restructuring initiatives, Nigeria still struggles with balancing debt
sustainability and economic growth. The persistence of high debt
service-to-revenue ratios raises the question of whether the country’s debt
management strategies are effective in promoting growth, or whether they are
contributing to economic stagnation and vulnerability.
This situation makes it imperative to critically
examine the impact of debt management on Nigeria’s economic growth, identifying
whether current borrowing patterns and management practices are fostering
development or worsening the country’s economic challenges.
However, Excessive borrowing without proper planning
can lead to a debt overhang, where a large portion of government revenue is
used to service debt, leaving fewer resources for development. Also High debt
levels can discourage both domestic and foreign investment due to concerns
about repayment capacity and potential economic instability.
Meanwhile, Poor debt management can lead to higher
interest rates on government borrowing, further increasing the cost of debt
servicing and a poorly managed debt situation can lead to economic instability,
including currency devaluation and inflation, which can negatively impact
businesses and individuals in the economic variables.
Due to improper management of debt in Nigeria,
rising debt servicing costs hitting into revenue, mismanagement and corruption
in loan utilization, over-reliance on foreign debt, Weak fiscal and
institutional control mechanisms, which contribute a lot toward the decline in
the economic growth of the country.
1.3 RESEARCH OBJECTIVES
Public debt management is the process of
establishing and executing a strategy for managing the government’s debt to
raise the required amount of funding, pursue its cost/risk objectives, and meet
any other public debt management goals the government may have set, such as
developing and maintaining an efficient and liquid market for government
securities. In a broader macroeconomic context for public policy, governments
should seek to ensure that both the level and the rate of growth in their
public debt are fundamentally sustainable over time and can be serviced under a
wide range of circumstances while meeting cost/risk objectives. Government debt
managers share fiscal and monetary policy advisers’ concerns that public sector
indebtedness remains on a sustainable path and that a credible strategy is in
place to reduce excessive levels of debt. Debt managers should ensure that the
fiscal authorities are aware of the impact of government financing requirements
and debt levels on borrowing costs.5 Examples of indicators that address the
issue of debt sustainability include the public sector debt-service ratio and
ratios of public debt to GDP and to tax revenue.
1.4 OBJECTIVES OF THE STUDY
This study aims to
critically examine the relationship between public debt management and economic
growth in Nigeria from 1980 to the present and the specific objectives of the
research includes;
1. To assess the effect of Nigeria’s debt profile on
government expenditure in key sectors such as education, health, and
infrastructure.
2.
To evaluate the impact of debt servicing on Nigeria’s fiscal stability
and economic development.
3.
To investigate the effectiveness of Nigeria’s debt management strategies
in ensuring debt sustainability and promoting growth.
4. To identify the key challenges hindering effective
debt management in Nigeria
1.5 RESEARCH QUESTIONS
1. How has public debt management influenced economic
growth in Nigeria over the years?
2.
What is the relationship between external debt and Nigeria’s economic
growth?
3.
How does domestic debt affect economic growth in Nigeria?
4. To what extent has debt servicing impacted Nigeria’s
economic performance?
1.6 HYPOTHESIS OF THE STUDY
1. H₀₁: Debt management has no significant impact on
economic growth in Nigeria.
2.
H₀₂: External debt does not significantly affect economic growth in
Nigeria.
3.
H₀₃: Domestic debt does not significantly contribute to economic growth
in Nigeria.
4. H₀₄: Debt servicing has no significant effect on
Nigeria’s economic performance.
1.7 JUSTIFICATION FOR THE STUDY:
Debt management has remained a critical aspect of
macroeconomic policy in Nigeria, given the country’s persistent reliance on
both domestic and external borrowing to finance budget deficits and development
projects. Over the years, the growing concern over Nigeria’s increasing debt
profile, rising debt service costs, and limited fiscal space has generated debates
among policymakers and scholars about the sustainability of such debt and its
implications for long-term economic growth. Therefore, studying the impact of
debt management on economic growth in Nigeria is timely, relevant, and
significant to both theory and policy.
This study is justified by the need to provide an
empirical assessment of how effective Nigeria’s debt management strategies have
been in promoting
Economic stability and growth. Despite several debt
restructuring efforts and the establishment of institutions such as the Debt
Management Office (DMO), the country continues to face challenges in
maintaining a sustainable debt-to-GDP ratio. By investigating the relationship
between debt management practices and economic performance, the research will
help to identify whether borrowing has been productive or counterproductive in
stimulating growth.
Furthermore, the study is important because it
addresses a pressing policy issue how to balance borrowing for development with
maintaining fiscal sustainability. Nigeria’s economy depends heavily on public
expenditure financed through borrowing; however, when such debts are poorly
managed, they can lead to debt overhang, crowding out private investment, and
fiscal crises. Understanding the nature of this relationship is essential for
designing more effective fiscal and debt policies that support sustainable
growth and development.
Academically, this research contributes to existing
literature by providing updated evidence on the dynamics between debt
management and economic growth in a developing country context. It will serve
as a reference point for future researchers, students, and policymakers
interested in public finance, debt sustainability, and macroeconomic
management.
1.8 SCOPE AND LIMITATIONS OF THE STUDY;
This research conveys the
adoption and examining the relationship between debt management and increments
in the economic variables in Nigeria. It comprises external and domestic debt
and how government policies on debt acquisition, servicing, and sustainability
affect key economic terrific such as; GDP growth, investment, inflation, and
employment. The research will identified secondary data from reliable sources
such as the Central Bank of Nigeria (CBN), Debt Management Office (DMO),
National Bureau of Statistics (NBS), and World Bank reports, spanning a period
of selected years to capture long-term trends. The study is restricted to
Nigeria and does not extend to other countries, although relevant international
comparisons may be drawn for context.
The study is restricted
to examining how debt is managed not merely accumulated and how the quality of
debt management practices affects Nigeria’s economic growth trajectory. It does
not extend to microeconomic effects of debt, household indebtedness, or
private-sector borrowing. Rather, it focuses exclusively on public debt
management, sustainability, maturity structure, and the implications of debt
servicing burdens on macroeconomic stability and growth.
The limitations of the study
The study will likely encounter the following
limitations;
First, it relies mostly on secondary data, which may
be affected by issues of accuracy, consistency, and availability.
Second, the scope is limited to macroeconomic
indicators and may not be able to capture the micro-level which impact the debt
management on individual or groups of individual or even specific sectors of
the economy at large.
Third, external shocks such as global oil price
fluctuations, political instability, and policy inconsistencies may hits
Nigeria’s debt situation and economic growth, which makes it to be difficult to
isolate the exact impact of debt management alone.
1.9 DEFINATIONS OF KEY TERMS:
Debt Management
Debt management refers to
the strategies, policies, and actions adopted by the Nigerian government to
acquire, use, monitor, and repay public debt in a sustainable manner. In the
context of Nigeria, effective debt management involves borrowing at the lowest
possible cost, ensuring that debt levels remain within manageable limits, and
using borrowed funds for productive investments that stimulate economic growth.
When debt is well-managed, it helps the country avoid financial crises, improve
investor confidence, and support national development goals. Poor debt
management, however, leads to excessive debt accumulation, fiscal instability,
and slow economic growth.
Economic Growth
Economic growth is the
increase in the value of goods and services produced in a country over time,
usually measured by the Gross Domestic Product (GDP). The relationship between
debt management and economic growth in Nigeria is important because the way
debt is acquired and used determines whether the economy expands or remains
stagnant. If borrowed funds are invested in productive sectors such as
infrastructure, education, power, and agriculture, economic growth is
strengthened. But if the loans are mismanaged or used for consumption rather
than development, debt becomes a burden on the economy, slowing growth.
Public Debt
Public debt refers to the
total amount of money owed by the Nigerian government to internal and external
creditors. It reflects how much the nation has borrowed to finance budget
deficits and development projects. Public debt can promote growth when it fills
the gap between government revenue and expenditure, especially in times of
limited revenue from crude oil. However, if public debt grows faster than the
country’s ability to repay, it puts pressure on national finances, crowds out
development spending, and becomes a threat to economic stability.
External Debt
External debt is the
portion of Nigeria’s public debt owed to foreign lenders such as international
organizations, foreign governments, or global financial markets. Borrowing
externally can be beneficial if the loans come with low interest rates and long
repayment periods, and if the funds are invested into productive sectors that
boost GDP and foreign exchange earnings. However, dependence on external debt
exposes Nigeria to currency exchange risks, fluctuating global interest rates,
and loan conditional ties. When external debt becomes excessive, a large
portion of export earnings goes into debt repayment, limiting funds available
for development.
Domestic Debt
Domestic debt represents
money borrowed within Nigeria through instruments such as Treasury Bills,
Bonds, and loans from commercial banks. Domestic debt can stimulate economic
growth if it supports local capital market development and finances key
infrastructure. It is considered safer than external debt because it is
borrowed in local currency and does not expose the country to exchange rate
volatility. But rising domestic debt also has a downside: it can crowd out
private sector borrowing by increasing interest rates, reducing business investment,
and slowing economic growth.
Debt Sustainability
Debt sustainability refers
to the ability of Nigeria to service and repay its debt without jeopardizing
economic stability, future borrowing, or development programs. A debt is
considered sustainable when the government can meet its debt obligations
without resorting to excessive borrowing or sacrificing essential public
services. If Nigeria’s debt remains sustainable, confidence is boosted among
investors, and the economy can grow smoothly. However, unsustainable debt leads
to financial distress, higher interest payments, and reduced funds for
education, healthcare, security, and growth-enhancing projects.
Debt Servicing
Debt servicing is the
process of paying interest and principal on borrowed funds. It is one of the
most critical factors affecting the link between debt and economic growth in
Nigeria. High debt servicing costs reduce the amount of money available for
capital projects, social services, and economic development. When a significant
share of national revenue is used to service debt, little is left for
productive economic activities, which slows growth. Effective debt management
aims to minimize debt servicing pressure so that more resources can be invested
in the economy.
Debt Burden
Debt burden refers to the
weight of debt on the economy, measured by how much debt servicing consumes
national income and limits development efforts. A heavy debt burden means that
the country is struggling to repay what it owes, forcing the government to cut
spending on key sectors or borrow more just to service existing loans. For
Nigeria, a high debt burden reduces the quality of life of citizens, increases
taxes or austerity measures, and limits government’s ability to fund economic
growth initiatives. A manageable debt burden contributes to economic stability
and growth
Debt Financing
Debt financing refers to
the government’s use of borrowing as a source of funds to support its spending
needs, development projects, or budget shortfalls. When used appropriately,
debt financing helps Nigeria achieve its development goals faster than relying
solely on revenue. It enables the government to invest in infrastructure,
energy, education, agriculture, and industry—sectors that stimulate long-term
economic growth. However, when debt financing is driven by recurrent
expenditure, wasteful spending, or corruption, it generates little economic
return, making repayment difficult and undermining growth.
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