IMPACT OF INFRASTRUCTURAL INVESTMENT ON EONOMIC GROWTH IN NIGERIA

ABSTRACT The study examines the impact of infrastructural investment on economic growth in Nigeria using data spanning 1991 to 2022. Specifically it assessed how investments in transportation infrastructure,telecommunication infrastructure and energy infrastructure influence economic growth using a multiple regression model. The study employed a unit roots test which showed evidence of non-stationarity of the variables, but a long run equilibrium relationship was recognized via a co-integration test. Thus, the short-run error correction model was estimated using the ordinary least squares technique and the results shows that investment in transportation infrastructure,telecommunication infrastructure and energy infrastructure have a significant positive impact on economic growth. Therefore based on the findings the study recommended the following: Investment in transportation infrastructure with higher marginal returns should be prioritized rather than expanding road networks indiscriminately .Public- private partnership should be encouraged to strengthen investment in telecommunication infrastructure and enhance industry- wide productivity . Strategic efforts should be directed toward improving energy infrastructure efficiency, particularly through energy efficient industries and renewable energy sources.