Abstract
Public expenditure constitutes a fundamental instrument of fiscal policy through which governments allocate financial resources to provide public goods and services, promote economic development, reduce poverty, and improve citizens' welfare. In Nigeria, public expenditure covers recurrent and capital expenditures incurred by the Federal, State, and Local Governments in sectors such as education, healthcare, transportation, security, agriculture, energy, and public administration. Effective management of public expenditure is essential for ensuring fiscal discipline, efficient resource allocation, transparency, and accountability in the utilization of public funds. Financial accountability, which refers to the obligation of public officials to properly account for the receipt, allocation, utilization, and reporting of public resources, has become increasingly important in response to growing concerns over corruption, budget leakages, financial mismanagement, abandoned projects, procurement irregularities, and weak financial reporting within the Nigerian public sector. To strengthen accountability, the Federal Government has introduced several public financial management reforms, including the Treasury Single Account (TSA), the Government Integrated Financial Management Information System (GIFMIS), the Integrated Payroll and Personnel Information System (IPPIS), the Open Treasury Portal, the Public Procurement Act, and the Fiscal Responsibility Act. Despite these reforms, challenges relating to inefficient expenditure management, poor budget implementation, weak institutional oversight, and inadequate compliance with financial regulations continue to undermine financial accountability. Although previous studies have examined public expenditure and economic growth or fiscal sustainability, empirical evidence regarding the effect of public expenditure on financial accountability in Nigeria remains limited and inconclusive. Against this background, this study investigates the effect of public expenditure on financial accountability in Nigeria. The study is anchored on Public Expenditure Theory, Agency Theory, and Stewardship Theory. Public Expenditure Theory emphasizes that government spending should be efficiently allocated and managed to maximize social welfare and achieve sustainable economic development. Agency Theory posits that public officials, acting as agents of the citizens, are expected to manage public resources prudently and transparently, while effective accountability mechanisms reduce agency problems arising from information asymmetry and opportunistic behaviour. Stewardship Theory argues that public sector managers serve as custodians of public resources and are expected to exercise integrity, responsibility, and transparency in managing government expenditure. Collectively, these theoretical perspectives provide a comprehensive framework for explaining the relationship between public expenditure and financial accountability in Nigeria. The study adopts an ex post facto research design utilizing secondary data obtained from the Budget Office of the Federation, the Office of the Accountant-General of the Federation, the Federal Ministry of Finance, the Central Bank of Nigeria (CBN), the National Bureau of Statistics (NBS), annual reports of the Auditor-General for the Federation, and other relevant government publications. A time-series research design covering a fifteen-year period will be employed to examine the relationship between public expenditure and financial accountability over time. Public expenditure will be measured using total government expenditure, recurrent expenditure, capital expenditure, sectoral expenditure, and expenditure-to-Gross Domestic Product (GDP) ratio, while financial accountability will be measured using budget implementation rate, audit compliance indicators, public expenditure efficiency, financial reporting quality, fiscal transparency indicators, and expenditure variance. Data analysis will involve descriptive statistics to summarize the characteristics of the study variables, correlation analysis to determine the degree of association among variables, and time-series econometric techniques, including Ordinary Least Squares (OLS), Autoregressive Distributed Lag (ARDL), and Error Correction Model (ECM), depending on the time-series properties of the data. Diagnostic tests including unit root tests, cointegration tests, multicollinearity, heteroskedasticity, autocorrelation, normality, stability tests, and model specification tests will be conducted to ensure the validity, consistency, and robustness of the empirical findings. The study anticipates that public expenditure will have a significant effect on financial accountability in Nigeria. Efficient and well-managed public expenditure is expected to improve budget implementation, strengthen financial reporting, enhance transparency in resource allocation, promote compliance with financial regulations, and improve public sector governance. Effective expenditure management is also anticipated to strengthen internal control systems, improve project monitoring and evaluation, reduce financial leakages, minimize corruption, and enhance public confidence in government institutions. Furthermore, prudent allocation and monitoring of public expenditure are expected to improve service delivery, increase institutional efficiency, strengthen fiscal discipline, and promote sustainable public financial management. Conversely, excessive or poorly managed public expenditure, weak expenditure controls, inadequate financial oversight, procurement irregularities, and ineffective monitoring mechanisms may increase financial mismanagement, reduce accountability, and undermine public trust in government institutions. Consequently, effective management of public expenditure is expected to contribute significantly to improving financial accountability, transparency, fiscal discipline, and good governance in Nigeria. This study is expected to make significant theoretical and empirical contributions to the literature on public sector accounting, public finance, fiscal policy, and governance by providing comprehensive evidence on the relationship between public expenditure and financial accountability in Nigeria. Unlike previous studies that focused primarily on public expenditure and macroeconomic growth, this research specifically examines financial accountability using comprehensive fiscal indicators and advanced time-series econometric techniques. The findings will provide valuable insights for the Federal Ministry of Finance, the Budget Office of the Federation, the Office of the Accountant-General of the Federation, the Office of the Auditor-General for the Federation, the Fiscal Responsibility Commission, policymakers, anti-corruption agencies, public sector managers, development partners, and academic researchers regarding the strategic importance of effective public expenditure management in strengthening accountability and promoting sustainable governance. The study will also provide evidence-based recommendations for improving expenditure planning, strengthening budget implementation, enhancing financial reporting systems, reinforcing public sector oversight, increasing fiscal transparency, and fostering accountable management of public resources in Nigeria.
Keywords: Public expenditure, financial accountability, public financial management, fiscal transparency, budget implementation, public sector governance, time-series analysis, fiscal discipline, public sector accounting, Nigeria.
