Comparing Early Post-Independence Nigeria with the Contemporary Nigerian Economy: Structural Transformation, Institutions and Welfare, 1960–2025: A Critical Historical-comparative study with statistical analysis

This study compares Nigeria’s early post-independence political economy, defined principally as 1960–1980, with the contemporary democratic and reform economy, defined as 1999–2025, while using 1981–1998 as a bridging period for statistical tests. The title is conceptually refined because contemporary Nigeria is itself post-independence; the valid comparison is therefore between phases of the same post-colonial trajectory rather than between ‘post-independence’ and a separate contemporary condition. The article adopts a critical historical-comparative design, combining national accounts, public-finance and sectoral data from the Central Bank of Nigeria (CBN) and National Bureau of Statistics (NBS) with World Bank, International Monetary Fund (IMF), Maddison Project and archival evidence. Descriptive statistics, compound growth rates, sector-share decomposition, Welch’s unequal-variance t-test and the Mann–Whitney test are employed. CBN constant-price data show that mean annual real GDP growth increased from 1.30 per cent in 1982–1998 to 4.85 per cent in 1999–2023; the difference is statistically significant (Welch t = −2.41, p = .023; Mann–Whitney p = .014). Yet the central finding is a transformation paradox: output, services, communications, finance and market depth expanded substantially, while productive employment, manufacturing capability, food security and mass welfare lagged. The share of services in constant-price GDP rose from 27.8 per cent in 1981 to 56.2 per cent in 2023, but manufacturing fell from 29.9 to 8.8 per cent, suggesting service-led diversification without full industrial deepening. Oil’s direct GDP share declined, and oil revenue fell to 29.4 per cent of federally collected revenue in 2023, but petroleum remained disproportionately important to exports, foreign exchange, fiscal expectations and political bargaining. The study concludes that Nigeria has achieved scale expansion and sectoral reallocation, but not a sufficiently productivity-enhancing, employment-rich and institutionally embedded structural transformation.

Nigeria; post-independence economy; structural transformation; oil dependence

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