The study examined the effect of foreign aid and aid-institutional quality interaction on economic growth in Nigeria for the period (1981 – 2022) using FMOLS method. The result of the study shows that foreign aid (ODA) exerted positive but insignificant impact on economic growth in Nigeria, indicating that ODA is relevant to Nigeria’s economic growth but is not among the major drivers of economic growth in Nigeria. The aid-institutional quality interaction variable, the ODA interaction with corruption index (ODA*CPI), showed negative relationship with economic growth which suggests that weak institution, especially corruption, had constrained the positive effect of ODA on economic growth in Nigeria. The ODA absorptive capacity constraint (ODA2) had a negative and significant impact on economic growth which suggests the existence of inverted U-shape relationship between ODA and economic growth. The negative coefficient of absorptive capacity constraint of ODA shows that there is a critical level which beyond, further increase in ODA will impede economic growth. As for other variables, labour force (L), domestic capital (K), crude oil price (COP), financial deepening (FDP) and trade openness (TOP) had positive and significant relationship with economic growth (RGDP) in Nigeria. The coefficient of foreign direct investment (FDI) had a negative sign, implying that FDI had a negative impact on economic growth in Nigeria. It is recommended that there should be prudent utilization of ODA received, better and effective macroeconomic policies, improvement in the quality of governance and strengthening of relevant institutions to abate the problem of pervasive corruption in the country. Finally, aid fungibility should be avoided.
Keywords: Nigeria, economic growth, foreign aid, institutional quality
