AN EMPIRICAL INVESTIGATION OF THE INTERACTIONS BETWEEN REMITTANCE INFLOWS AND HUMAN CAPITAL DEVELOPMENT (IMPLICATION FOR THE ECONOMIC GROWTH IN NIGERIA)

CHAPTER ONE

INTRODUCTION

1.1 Background of the Study

The nexus between remittance inflows, human capital development, and economic growth in developing economies, particularly Nigeria, has continued to generate robust scholarly and policy debates. Historically anchored in the foundational works of Orozco (2003), Ambrosius (2006), and Chami et al. (2008), contemporary discourse has been substantially enriched by a growing body of empirical evidence from the post-2022 era. Remittances defined as monetary transfers made by migrants to their countries of origin have evolved into a pivotal source of development finance, often surpassing foreign direct investment (FDI) and official development assistance (ODA) in volume and stability (Kudaisi et al., 2022; World Bank, 2023).

In Nigeria, the intersection of remittance inflows with human capital development is particularly consequential. The Nigerian financial sector has undergone successive rounds of reform and structural adjustment aimed at deepening financial intermediation, enhancing the absorptive capacity for both domestic and foreign capital, and creating a more enabling environment for private sector investment (Kudaisi et al., 2022). Against this backdrop, remittance inflows have assumed strategic significance as a complementary source of external development finance. The Central Bank of Nigeria (CBN) reported a historic increase in remittance inflows, reaching $553 million in July 2024 alone a 130 per cent rise compared to the same period in the preceding year underscoring the accelerating importance of diaspora transfers in Nigeria's macroeconomic architecture (CBN, 2024; Owotemu et al., 2024).

Globally, remittance flows to low- and middle-income countries (LMICs) reached an estimated $656 billion in 2023, representing a modest 0.77 per cent growth from 2022 (World Bank, 2023). Within Sub-Saharan Africa, total remittance receipts climbed to $54 billion in 2023, of which Nigeria alone accounted for $19.5 billion approximately 35 per cent of the subregional total (World Bank, 2023; Arise TV, 2024). Nigeria's remittance-to-GDP ratio of approximately 4 per cent exceeds that of major economies such as India, Germany, France, and China, further underscoring the critical developmental significance of these flows (Azolibe et al., 2022). As noted by the World Bank's Migration and Development Brief (2023), remittance flows to Sub-Saharan Africa were nearly 1.5 times the size of foreign direct investment inflows in 2023, making diaspora remittances the dominant source of external finance for the region.

The developmental impact of remittances, however, extends beyond macroeconomic aggregates. At the household and sectoral levels, remittances have been identified as significant drivers of human capital accumulation, particularly through expenditure on education and healthcare (Nangih & Nwineewii, 2024; Adeagbo, 2024). Empirical studies confirm that remittances enable greater access to educational services and health facilities, thereby improving the Human Development Index (HDI) of recipient countries (Adeagbo, 2024; Orekoya & Tijani, 2023). The study by Omoniyi and Owoeye (2024) further substantiates that a 1 per cent increase in remittances corresponds to a 0.32 per cent long-run increase in GDP in Nigeria, reinforcing the developmental multiplier embedded in remittance utilisation.

Notwithstanding these positive associations, the empirical literature is not without contradictions. Kudaisi et al. (2022), deploying a generalised method of moments (GMM) approach on Nigerian data from 1990 to 2018, found that both remittances and financial liberalisation exerted statistically significant negative impacts on economic growth, pointing to potential structural constraints in the financial sector's capacity to channel remittances productively. Similarly, Okwu et al. (2023) reported that while remittances correlate strongly with improvements in life expectancy and income, their causal effect on human capital indicators such as school enrolment remains statistically insignificant, suggesting that the mechanism through which remittances affect human capital development is complex and context-dependent.

Despite the phenomenal growth in Nigeria's remittance inflows, the challenge of informality persists. A significant proportion of remittances continues to flow through informal and unrecorded channels, complicating the assessment of their true magnitude and developmental impact (Owotemu et al., 2024; Emmanuel et al., 2024). The negative externality of brain drain a concomitant of migration further complicates the remittance-development calculus, as the emigration of skilled professionals in healthcare, education, and technology may offset the human capital gains attributable to remittance inflows (Al-Jabieri et al., 2025; Ojeyinka & Ibukun, 2024).

This study, therefore, situates itself within the growing corpus of country-specific empirical investigations that seek to trace the interactions between remittance inflows and human capital development in Nigeria. Given the heterogeneous and context-specific nature of remittance impacts across different economies (Owoeye & Omoniyi, 2024), aggregate cross-country findings offer limited policy traction for Nigeria's unique socioeconomic milieu. The present investigation responds to this gap by developing an econometric framework that explicitly links remittance inflows to key human capital sector variables education spending and healthcare expenditure within the Nigerian economy, thereby contributing to the evidence base needed for targeted policy formulation.

1.2 Statement of the Problem

The growing volume of remittance inflows to Nigeria makes the question of their developmental impact increasingly urgent. Between 8 and 15 million Nigerians are estimated to reside abroad, many of whom maintain active financial ties to their families through regular remittances (Nwajiuba, 2005; Tomori & Adebiyi, 2007). Nigeria's prevailing socioeconomic conditions characterised by high unemployment, infrastructural deficits, inadequate public healthcare, and a weakly funded educational system create a context in which remittances may serve as a critical complement to government-funded human capital investment (Azolibe et al., 2022; Adedokun, 2023).

The healthcare dimension of this problem is particularly acute. Over the period 2000 to 2019, government-funded health expenditure per capita in Nigeria averaged just $10.44, while private expenditure reached $52.64 (World Bank, 2023). Both figures fall significantly short of the estimated $86 per capita required to support universal health coverage, as prescribed by the World Health Organization (2022). Remittances, channelled through households, may partially bridge this gap; however, the extent to which they translate into systematic improvements in healthcare access and spending remains empirically underexplored for Nigeria (Azolibe et al., 2022; Bridging Health Divides, 2024).

On the education front, findings from the literature present a mixed picture. While studies such as Wanger and Aras (2022) in Nigeria and Sapkota and Malakar (2021) in Nepal document a positive association between remittances and school attendance, Shafiq et al. (2022), using ARDL methodology on Nigerian data from 1981 to 2022, found that a one-unit increase in remittances is associated with a statistically insignificant decline in secondary school enrolment, suggesting that remittances may be prioritised for basic consumption needs including housing, healthcare, and daily expenses rather than schooling. This ambiguity underscores the need for further Nigeria-specific empirical investigation.

Furthermore, a fundamental structural concern pervades the literature: the risk that remittances function primarily as consumption transfers rather than as catalysts for productive human capital investment. As documented by Adeseye (2021), approximately 70 per cent of remittances flowing into Nigeria are directed towards consumption, with only 30 per cent channelled into investment activities. This consumption bias potentially limits the long-run human capital and growth effects of remittance inflows. Owotemu et al. (2024) also identify regulatory bottlenecks and the dominance of informal remittance corridors as structural impediments that constrain the productive utilisation of diaspora transfers.

The formal financial sector's capacity to intermediate remittance flows remains constrained by low financial deepening, measured by credit-to-GDP ratios and monetary aggregates, which limits the extent to which households can leverage remittances for long-term human capital investment. A large portion of the Nigerian population particularly those in the informal sector lacks access to formal financial services, which compounds the challenge of directing remittance flows towards education and healthcare (Uweis, 2022; Ali Bare et al., 2022).

In recognition of these gaps, this study poses the following research questions:

1. What are the interactions between remittance inflows and human capital investment in Nigeria?

2. What is the impact of remittances on education spending in Nigeria?

3. What is the impact of remittances on healthcare expenditure in Nigeria?

1.3 Objectives of the Study

The broad objective of this study is to empirically investigate the interactions between remittance inflows and human capital development in Nigeria, with implications for economic growth. Specifically, the study pursues the following objectives:

i) To examine the impact of remittances on education spending in Nigeria.

ii) To examine the impact of remittances on healthcare expenditure in Nigeria.

1.4 Hypotheses of the Study

Based on the foregoing objectives, the following null hypotheses are formulated:

H₀₁: There is no significant impact of remittances on education spending in Nigeria.

H₀₂: There is no significant impact of remittances on healthcare spending in Nigeria.

1.5 Policy Relevance of the Study

The policy significance of this study derives from the rapidly growing role of remittance inflows in Nigeria's external finance landscape and the persistent gaps in public investment in human capital. Policymakers, particularly the Central Bank of Nigeria (CBN), the Federal Ministry of Education, and the Federal Ministry of Health, require robust empirical evidence on how remittance flows translate into human capital outcomes in order to design effective policies that leverage diaspora transfers for developmental purposes.

Recent policy initiatives including the CBN's Non-Resident BVN platform aimed at facilitating formal diaspora remittance channels (CBN, 2024) reflect a growing recognition among Nigerian policymakers of the untapped developmental potential of remittances. Nevertheless, as Owotemu et al. (2024) note, these policy efforts must be grounded in a clear understanding of the channels through which remittances affect human capital development, rather than treating diaspora inflows as a homogeneous resource.

The World Bank (2023) has flagged the high cost of remittance transfers to Nigeria averaging 7.9 per cent of the amount sent in the fourth quarter of 2023, far above the Sustainable Development Goal (SDG) target of 3 per cent as a critical policy concern. Reducing transfer costs could substantially increase the volume of remittances available for human capital investment. This study's findings are expected to provide an empirical basis for such policy interventions and to strengthen the evidence base on the remittance-human capital nexus in Nigeria.

Furthermore, understanding whether remittances are predominantly directed towards consumption or human capital investment as canvassed in the literature by Adeseye (2021) and Owotemu et al. (2024) is essential for designing incentive structures that redirect a greater share of diaspora transfers towards education expenditure and healthcare spending.

1.6 Scope of the Study

This study is limited to examining the impact of remittance inflows on human capital development in Nigeria. It employs secondary time-series data on the portion of remittance inflows directed towards the human capital development sectors, principally education spending and healthcare expenditure. Consistent with the approach adopted in related studies such as Adeagbo (2024) and Orekoya and Tijani (2023), human capital development is broadly conceived to encompass investments in education and health the two primary channels through which remittances are expected to exert their developmental effects.

The study covers the period from 1970 to 2010, though reference is made to recent developments up to 2024 where available data permit. It is a Nigeria-specific investigation and does not generalise its findings to other sub-Saharan African or developing country contexts, in recognition of the country-specific nature of remittance impacts as highlighted by Owoeye and Omoniyi (2024).

1.7 Definition of Terms

Remittances: For the purposes of this study, remittances are defined as the portion of earnings in foreign currency that migrants particularly Nigerians residing abroad transfer to family members, households, or communities in Nigeria. This encompasses personal transfers between resident and non-resident individuals, as well as compensation of employees who are employed in an economy where they are not resident. Consistent with the World Bank (2023) definition, remittances serve as a crucial source of income smoothening, poverty reduction, and human capital investment for recipient households.

Human Capital Development: Human capital development refers to the process of enhancing the productive capacities, knowledge, skills, and health of individuals in an economy. In this study, human capital development is operationalised through two key sectoral indicators: (i) government and private expenditure on education, and (ii) government and household expenditure on healthcare. This conceptualisation is consistent with the Human Development Index (HDI) framework of the United Nations Development Programme (UNDP), which incorporates education and health as the primary non-income dimensions of human development (Adeagbo, 2024; Nangih & Nwineewii, 2024).

Economic Growth: Economic growth, in the context of this study, refers to the sustained increase in the real output of goods and services in an economy over time, typically measured by the growth rate of real Gross Domestic Product (GDP) or GDP per capita. It is used as a benchmark outcome variable through which the downstream effects of remittance-induced human capital investment are assessed.

Foreign Direct Investment (FDI): Foreign direct investment refers to cross-border investment in which an investor establishes a lasting interest and significant degree of influence in an enterprise in a foreign country. FDI is used in this study as a comparator variable against which the magnitude and stability of remittance inflows are benchmarked.

Official Development Assistance (ODA): ODA refers to government aid designed to promote the economic development and welfare of developing countries. Like FDI, ODA serves as a reference point for evaluating the relative importance of remittances as a source of external development finance for Nigeria.

Brain Drain: Brain drain refers to the emigration of highly skilled and educated professionals from a developing country such as Nigeria to developed nations in search of better economic opportunities. In the context of remittance studies, brain drain poses a paradox: while it contributes to the inflow of remittances, it simultaneously depletes the stock of human capital in the sending country, potentially offsetting the developmental gains attributable to those remittances (Al-Jabieri et al., 2025; Ojeyinka & Ibukun, 2024).

Human Development Index (HDI): The HDI is a composite index developed by the UNDP that measures average achievement in three key dimensions of human development: (i) a long and healthy life, measured by life expectancy at birth; (ii) knowledge, measured by mean years of schooling for adults and expected years of schooling for children; and (iii) a decent standard of living, measured by gross national income (GNI) per capita (PPP). The HDI is employed in several related empirical studies as a proxy for the level of human capital development (Adeagbo, 2024; Nangih & Nwineewii, 2024).

Diaspora: The diaspora refers to the community of Nigerian citizens living outside the borders of Nigeria, whether temporarily or permanently, who maintain socioeconomic and cultural ties with their country of origin. Nigerian diaspora members are the primary source of remittance inflows studied in this work.

Financial Deepening: Financial deepening refers to the increased provision of financial services and the wider availability of financial instruments in an economy. It is typically measured by ratios such as credit to the private sector as a share of GDP, and M2 or M3 monetary aggregates as a share of GDP. Low financial deepening in Nigeria is identified in the literature as a constraint on the productive channelling of remittances into human capital investment (Uweis, 2022; Ali Bare et al., 2022).

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