A Multivariate Time-Series Analysis of Human Capital Development and Economic Growth in Nigeria

Despite being the most populous nation in Africa and possessing vast natural resources, Nigeria’s economic growth trajectory remains volatile and heavily reliant on oil rents. While neoclassical and endogenous growth theories posit that human capital development (HCD) is a fundamental driver of long-term economic growth, the empirical reality in Nigeria suggests a disconnect between investments in education and health and actual macroeconomic output. This study investigates the nuanced relationship between human capital development and economic growth in Nigeria from 1986 to 2024, explicitly controlling for a comprehensive matrix of confounding variables: investment in physical capital, trade openness, inflation rate, exchange rate volatility, governance quality, policy stability, population growth rate, labor force participation rate, natural resource dependence, and technological adoption. Utilizing the Autoregressive Distributed Lag (ARDL) bounds testing approach to cointegration, the study finds that while human capital exhibits a positive long-run relationship with economic growth, its short-run impact is statistically muted. Crucially, the results reveal that governance quality and physical capital investment act as necessary preconditions for HCD to translate into tangible economic growth. The study concludes that without addressing institutional bottlenecks and macroeconomic instability, Nigeria’s human capital will continue to suffer from "brain drain" and underutilization. The paper contributes to knowledge by moving beyond bivariate analyses to provide a holistic, empirically grounded framework for understanding the mechanics of human capital in a resource-dependent, institutionally fragile economy.