IMPACT OF IMPORT TARIFF ON INDUSTRIAL OUTPUT IN NIGERIA (1980-2024)

Student: Mary Ibidunni Onojobi
Supervisor: Dr Emmanuel Ofoezie
HOD: Dr Emmanuel Ofoezie
Department of Economics
Humanities and Social Science
Joseph Ayo Babalola University, Ikeji-Arakeji, Osun State

Abstract

This study investigates the impact of import tariffs on industrial output in Nigeria from 1980 to 2024. Motivated by concerns over the effectiveness of trade protectionist policies in fostering domestic industrial growth, the study employs a log-linear gravity model to analyse time-series data sourced from the World Bank and Central Bank of Nigeria. The study tests for stationarity using unit root tests, establishes long-run relationships through cointegration analysis, and estimates the model using Ordinary Least Squares (OLS) regression. Findings reveal that while moderate tariffs can encourage import substitution, excessive tariffs are negatively associated with industrial output, reflecting inefficiencies and cost escalations in production. The study concludes that a balanced tariff regime, supported by improved infrastructure and policy consistency, is essential for sustainable industrial development in Nigeria. It recommends that policymakers adopt trade policies that promote competitiveness while avoiding over-protectionis

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