Trade Liberalization, Export Diversification and Economic Growth in Nigeria
Abstract
This study investigated the dynamic short-run and long-run effects of trade liberalization, export diversification, and economic growth on Nigeria over the period 1981 to 2024, utilizing the Autoregressive Distributed Lag (ARDL) modelling framework. The empirical analysis is structured into three interrelated models. Model 1 examined the impact of trade liberalization— proxied by trade openness) and infrastructure (INFR)—on export diversification (EDIV). The results revealed a positive and statistically significant relationship, indicating that increased openness to trade and improvements in infrastructure significantly enhance Nigeria’s export diversification. Model 2 assessed the influence of export diversification, capital formation (CAP), labour force growth (LAB), and trade liberalization on real GDP growth (GDPG). Findings showed that these variables significantly contribute to economic development by fostering industrial diversification, stimulating innovation, creating employment opportunities, and increasing foreign exchange earnings. Model 3 synthesized the insights from the first two models, showing that export diversification, capital formation, and labour force growth jointly mediate the relationship between trade liberalization and economic growth, with statistically significant effects in both the short and long run. However, the analysis also identified negative relationships between inflation (INF), the real effective exchange rate (REER), and key economic indicators across the models. The study concluded that sustainable economic growth through trade liberalization and export diversification requires robust macroeconomic stability, quality infrastructure investment, strategic FDI targeting, and sound monetary policy.
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References
Adediran, O. S., & Okonkwo, O. (2016). Export diversification and economic growth in Nigeria: An econometric analysis. Journal of Economics and Sustainable Development, 7(15), 50–59.
Adewuyi, A. O. (2006). Trade policy reform and technical efficiency in Nigeria's manufacturing sector. African Economic Research Consortium Research Paper No. 151.
Adewuyi, A. O., & Bankole, A. S. (2006). Trade policy reform and performance of Nigeria’s manufacturing sector. Nigerian Journal of Economic and Social Studies, 48(1), 1–30.
Ajanaku, J. O., & Asongu, S. A. (2022). Trade liberalization, institutional quality, and inclusive growth in Africa: A dynamic panel analysis. African Development Review, 34(3), 265–280.
Akpan, U. F., & Atan, J. A. (2020). Export expansion grant and non-oil export performance in Nigeria: A dynamic analysis. International Journal of Economics and Financial Issues, 10(1), 35–42.
Alege, P. O., & Osabuohien, E. S. (2015). Trade openness and export diversification in Nigeria: A dynamic analysis. Journal of Developing Areas, 49(3), 91–108.
Dickey, D.A., & Fuller, W.A. (1979). Distribution of the estimators for autoregressive time series with a unit root. Journal of the American Statistical Association, 74(366), 427-431.
Effiom, L., & Etim, R. S. (2019). Export diversification and total factor productivity in Nigeria: Evidence from the GMM approach. African Journal of Economic Policy, 26(1), 45–62.
Eze, N. C., & Obiora, K. (2022). Export sophistication and economic growth in Nigeria: Evidence from disaggregated exports. International Journal of Development Issues, 21(2), 145–161.
Hausmann, R., & Rodrik, D. (2003). Economic development as self-discovery. Journal of Development Economics, 72(2), 603–633. https://doi.org/10.1016/S0304-3878(03)00124-X
Ibrahim, M., & Ahmed, M. (2009). Export diversification and economic growth in Nigeria: An empirical investigation. CBN Economic and Financial Review, 47(4), 29–50.
Johansen, S. (1991). Estimation and hypothesis testing of co-integration vectors in Gaussian vector autoregressive models. Econometrica, 59(6), 1551-1580.
Krugman, P. R. (1981). Intraindustry specialization and the gains from trade. Journal of Political Economy, 89(5), 959–973. https://doi.org/10.1086/261024
Lawal, E. O., & Ezeani, E. (2013). Impact of trade liberalization on economic growth in Nigeria: A disaggregated analysis. International Journal of Economic Development Research and Investment, 4(1), 50–59.
Nwachukwu, T. E., & Egwaikhide, F. O. (2013). Trade liberalization and industrial performance in Nigeria. The Nigerian Journal of Economic and Social Studies, 55(3), 407–428.
Nwokoma, N., & Okonkwo, O. (2021). Export diversification, sectoral composition and economic growth in Nigeria: Evidence from dynamic models. Journal of African Trade, 8(1), 1–12.
Ogun, O. (2008). Trade policy and export diversification: Evidence from Nigeria. In K. Fosu & O. O. Olayemi (Eds.), Trade liberalization and growth in sub-Saharan Africa (pp. 79–104). New York: Routledge.
Ogunkola, E. O., & Jerome, A. (2011). Trade liberalization and Nigeria’s export performance: Evidence from panel analysis. In A. Ariyo (Ed.), Macroeconomic policy, investment and growth in Nigeria (pp. 145–172). Ibadan: University Press.
Okafor, G., & Adeleye, B. (2023). Trade openness and export diversification in Nigeria: New evidence using Theil index. Journal of African Business, 24(1), 21–40.
Okonkwo, O., & Nwakoby, C. I. (2019). Trade openness and economic growth in Nigeria: An ARDL approach. Central Bank of Nigeria Economic and Financial Review, 57(3), 1–24.
Olufayo, O. O., & Akinbobola, T. O. (2020). Threshold effects of trade openness on economic growth in Nigeria. Journal of Economic Studies, 47(5), 1111–1133.
Opaluwa, D., Umeh, J. C., & Abu, A. (2010). The effect of trade liberalization on Nigeria’s economic growth. Journal of Economics, 1(1), 13–17.
Orebiyi, P. A., & Effiong, U. E. (2023). Export Diversification, Financial Sector Development and Economic Growth: Empirical Evidence from West African Sub-Region. Studies in Economics and Business Relations, 4(2), 13 – 36.
Oyejide, T. A., & Bankole, A. S. (2001). Liberalization of the external trade and payment system in Nigeria. In S. M. M. Wangwe (Ed.), Exporting Africa: Technology, trade and industrialization in Sub-Saharan Africa (pp. 138–173). London: Routledge.
Pesaran, M.H., Shin, Y., & Smith, R.J. (2001). Bounds testing approaches to the analysis of level relationships. Journal of Applied Econometrics, 16(3), 289-326.
Phillips, P.C.B., & Perron, P. (1988). Testing for a unit root in time series regression. Biometrika, 75(2), 335-346.
Preacher, K.J., & Hayes, A.F. (2008). Asymptotic and resampling strategies for assessing and comparing indirect effects in multiple mediator models. Behavior Research Methods, 40(3), 879-891.
Prebisch, R. (1950). The economic development of Latin America and its principal problems. United Nations Economic Commission for Latin America.
Romer, P. M. (1990). Endogenous technological change. Journal of Political Economy, 98(5, Part 2), S71–S102. https://doi.org/10.1086/261725
Singer, H. W. (1950). The distribution of gains between investing and borrowing countries. American Economic Review, 40(2), 473–485.
Ude, D. K., & Agodi, J. E. (2014). Diversification of the Nigerian economy towards a sustainable growth and economic development. International Journal of Economics and Development Research, 2(2), 28–41.
Uzonwanne, M. C. (2015). Economic diversification in Nigeria: The role of agriculture and manufacturing. International Journal of Economics and Financial Research, 1(2), 56–65.
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