This study examines the effect of recurrent and capital health expenditure on life expectancy in Nigeria over the period 1990–2023, addressing a persistent puzzle in the health economics literature: the apparent disconnect between rising health spending and modest longevity gains in Nigeria despite decades of policy reform. Anchored theoretically in Grossman's Human Capital Theory and Health Production Function Theory, alongside Romer's Endogenous Growth Theory, the study estimates the elasticity of life expectancy with respect to recurrent health expenditure (RHE) and capital health expenditure as a share of GDP (CHE%GDP), controlling for real GDP per capita. Using annual time-series data (N = 34) sourced from the World Bank's World Development Indicators, the Central Bank of Nigeria Statistical Bulletin, and the WHO Global Health Expenditure Database, the study applies the Autoregressive Distributed Lag (ARDL) bounds-testing approach of Pesaran, Shin, and Smith (2001), following confirmation via ADF, Phillips–Perron, and KPSS tests that all series are integrated of order one, I(1). The bounds test yields a computed F-statistic of 12.191 (p = 2.71 × 10⁻⁸), decisively rejecting the null of no long-run relationship among life expectancy, health expenditure, and income. The estimated long-run coefficients are correctly signed recurrent expenditure (+0.298) and capital expenditure (+0.419) consistent with theoretical priors, though neither reaches conventional statistical significance, and the error correction term, while negatively signed (−0.0105), implies an implausibly slow speed of adjustment and is itself statistically insignificant. The model passes the full battery of diagnostic tests (serial correlation, heteroskedasticity, normality, functional form, and parameter stability). The study concludes that a genuine long-run relationship between health expenditure and life expectancy in Nigeria is well supported, but that thirty-four years of annual national-level data are insufficient to pin down its precise magnitude and dynamics with statistical confidence a substantive methodological finding in its own right. The study recommends sustained recurrent and capital health investment, improved public data infrastructure at higher frequency, and larger-scale state-level panel studies to sharpen precision in future research.
Table of Contents
CHAPTER ONE
INTRODUCTION
1.1 Background of the Study
1.2 Statement of the Problem
1.3 Research Questions
1.4 Objectives of the Study
1.5 Significance of the Study
1.6 Scope of the Study
1.7 Organization of the Study
CHAPTER TWO
LITERATURE REVIEW
2.1 Introduction
2.2 Conceptual Review
2.2.1 Concept of Health Expenditure
2.2.2 Concept of Life Expectancy
2.2.3 Recurrent Health Expenditure and Life Expectancy
2.2.4 Capital Health Expenditure and Life Expectancy
2.2.5 Health Expenditure and Economic Development
2.3 Theoretical Framework
2.3.1 Human Capital Theory
2.3.2 Health Production Function Theory
2.3.3 Endogenous Growth Theory
2.4 Empirical Review
2.5 Research Gap
CHAPTER THREE
RESEARCH METHODOLOGY
3.1 Introduction
3.2 Research Design
3.3 Nature and Sources of Data
3.4 Model Specification
3.5 Description and Measurement of Variables
3.6 Estimation Technique
3.6.1 Unit Root Testing
3.6.2 Cointegration (Bounds) Testing
3.6.3 Short-Run and Long-Run Estimation
3.6.4 Diagnostic and Stability Tests
3.7 A Priori Expectations
3.8 Chapter Summary
CHAPTER FOUR
DATA PRESENTATION, ANALYSIS, AND DISCUSSION OF FINDINGS
4.1 Introduction
4.2 Descriptive Statistics
4.3 Correlation Analysis
4.4 Unit Root Tests
4.5 ARDL Model Estimation
4.6 Bounds Test for Cointegration
4.7 Long-Run Estimates
4.8 Short-Run Estimates (Error Correction Model)
4.9 Diagnostic Tests
4.10 Discussion of Findings
4.11 Chapter Summary
CHAPTER FIVE
SUMMARY, CONCLUSION, AND RECOMMENDATIONS
5.1 Introduction
5.2 Summary of Findings
5.3 Conclusion
5.4 Recommendations
5.5 Contribution to Knowledge
5.6 Limitations of the Study
5.7 Suggestions for Further Research
Objectives & Topics
The primary objective of this study is to empirically investigate the impact of recurrent and capital government health expenditures on life expectancy in Nigeria over the period 1990–2023. By addressing the empirical puzzle of why decades of nominal spending increases and policy reforms have yielded only modest longevity gains, the study seeks to determine whether a genuine long-run equilibrium relationship exists among healthcare spending components, national income, and life expectancy, while assessing the specific elasticities and short-run adjustment mechanisms of both operational and infrastructural outlays.
- The disaggregated effects of recurrent health expenditure (salaries, drugs, operational costs) and capital health expenditure (infrastructure, technology, facilities) on national health outcomes.
- Theoretical foundations connecting public health financing to population longevity via Human Capital Theory, Health Production Function Theory, and Endogenous Growth Theory.
- Econometric time-series modeling using unit root tests (ADF, PP, KPSS) and the Autoregressive Distributed Lag (ARDL) bounds-testing approach to cointegration.
- Evaluation of short-run error correction dynamics, speed-of-adjustment parameters, and structural stability across multiple policy regimes in Nigeria.
- Institutional and structural obstacles, such as corruption, resource misallocation, high out-of-pocket spending, and urban-rural disparities, that attenuate health expenditure efficiency.
Excerpt from the Book
1.2 Statement of the Problem
Despite increased recognition of the importance of healthcare financing and several policy reforms in Nigeria's health sector, the country continues to record relatively low life expectancy compared to many developing and emerging economies. As Figure 1.1 illustrates, the improvement in life expectancy over nearly four decades has been gradual and, at times, stagnant, remaining insufficient relative to the level of resources nominally committed to the sector (Eze & Chukwu, 2023). This persistent gap raises critical concerns about the effectiveness of health expenditure in improving population health outcomes.
The central issue lies in the apparent disconnect between rising health expenditure and the modest gains in life expectancy. In theory, increased investment in healthcare through both recurrent and capital expenditure should lead to improved health infrastructure, better service delivery, and reduced mortality rates. However, in practice, these expected outcomes have not been fully realized in Nigeria. This suggests that factors such as inefficiency in resource allocation, weak institutional frameworks, and poor implementation of health policies may be undermining the impact of health spending (Olatunji & Afolabi, 2022).
Furthermore, the structure and management of health expenditure present additional challenges. Recurrent expenditure, which is meant to sustain the day-to-day functioning of healthcare facilities, is often characterized by issues such as delayed salary payments, inadequate supply of drugs, and poor maintenance of medical equipment. Similarly, capital expenditure, intended to support long-term healthcare development through infrastructure and technological advancement, is frequently affected by project delays, mismanagement, and corruption (Musa & Sani, 2024). These inefficiencies reduce the overall effectiveness of health spending and limit its potential to improve life expectancy.
Nigeria also faces significant public health challenges that further complicate the relationship between health expenditure and life expectancy. The country continues to experience high rates of maternal and infant mortality, widespread prevalence of communicable diseases such as malaria and tuberculosis, and a growing burden of non-communicable diseases including hypertension and diabetes. These health challenges place enormous pressure on the healthcare system and absorb a substantial portion of available resources, thereby limiting the impact of expenditure on improving longevity (Suleiman & Abdulkadir, 2021).
Overview of Chapters
CHAPTER ONE: INTRODUCTION: Introduces the research problem surrounding Nigeria's slow longevity growth despite nominal funding increases, outlining the research questions, objectives, significance, and temporal scope.
CHAPTER TWO: LITERATURE REVIEW: Examines conceptual definitions, theoretical frameworks including Grossman's Human Capital and Health Production Function theories and Romer's Endogenous Growth Theory, and reviews empirical literature to establish the research gap.
CHAPTER THREE: RESEARCH METHODOLOGY: Outlines the ex post facto quantitative design, specifies data sources from the World Bank and Central Bank of Nigeria, and formulates the econometric ARDL bounds-testing and error correction model.
CHAPTER FOUR: DATA PRESENTATION, ANALYSIS, AND DISCUSSION OF FINDINGS: Presents empirical estimations including descriptive statistics, unit root testing, ARDL cointegration results, long-run and short-run dynamics, diagnostic evaluations, and discussion of statistical limitations.
CHAPTER FIVE: SUMMARY, CONCLUSION, AND RECOMMENDATIONS: Synthesizes the core empirical results, draws methodological and policy conclusions, and provides concrete recommendations for healthcare investment, public data infrastructure, and future sub-national research.
Keywords
Health Expenditure, Life Expectancy, Nigeria, ARDL Bounds Testing, Cointegration, Error Correction Model, Recurrent Expenditure, Capital Expenditure, Human Capital Theory, Health Production Function, Public Health Financing, Longevity, Macroeconomic Determinants
Frequently Asked Questions
What is the core subject and scope of this study?
The study investigates the relationship between federal health expenditures—divided into recurrent and capital spending—and life expectancy in Nigeria over a 34-year period from 1990 to 2023, while controlling for real GDP per capita.
What are the primary thematic areas explored in the research?
The work explores public health economics, human capital formation, macroeconomic growth theories, econometric cointegration modeling, and institutional constraints on healthcare delivery in developing economies.
What specific research questions guide the investigation?
The study examines the individual effects of recurrent health expenditure and capital health expenditure on life expectancy, and asks whether a stable long-run equilibrium relationship exists among healthcare spending, income, and longevity in Nigeria.
Which econometric methodologies are employed?
The author uses Augmented Dickey-Fuller (ADF), Phillips-Perron (PP), and KPSS tests to verify the integration order of the time series, followed by the Autoregressive Distributed Lag (ARDL) bounds-testing procedure and an Unrestricted Error Correction Model (UECM).
What key insights are presented in the empirical main body?
The empirical section establishes a statistically significant long-run cointegrating relationship (F = 12.191). However, while the long-run coefficients for recurrent and capital spending are positive, they do not achieve conventional statistical significance, and the error correction adjustment speed is remarkably slow.
Which keywords best encapsulate this publication?
Key terms include health expenditure, life expectancy, ARDL bounds testing, cointegration, recurrent health spending, capital health spending, Nigeria, and human capital theory.
Why did the study disaggregate health expenditure into recurrent and capital components?
Disaggregating spending allows the analysis to distinguish between the immediate operational effects of healthcare delivery (such as medical personnel salaries, pharmaceuticals, and day-to-day clinic supplies) and the long-term, delayed impacts of infrastructural capital investments (such as hospital construction and specialized diagnostic equipment).
How does the study explain the lack of statistical significance in the long-run expenditure coefficients?
The lack of significance stems from high persistence in the life expectancy series, multicollinearity between recurrent spending and per capita income, and the inherent statistical power limitations of using 34 annual observations for slow-moving demographic variables.
What policy recommendations does the author offer to improve health outcomes in Nigeria?
The author recommends prompt and complete disbursement of operational budgets for personnel and supplies, coordinating capital projects with sufficient operational maintenance, improving public data collection at higher frequencies, and commissioning sub-national state-level panel studies.
- Quote paper
- Peter Ellah (Author), 2026, Effect of Health Expenditure on Life Expectancy, Munich, GRIN Verlag, https://www.grin.com/document/1749045
