An Assessment of the Impact of Monetary Policy on Economic Growth in Nigeria: Toda-Yamamoto Approach

Abstract

This study interrogated the impact of monetary policy on economic growth in Nigeria using annual time series data from 1981 to 2020. The paper used the growth rate of gross domestic product (GRGDP) as the endogenous variable, while, broad money supply (MS2), monetary policy rate (MPR), Inflation (INFL), liquidity ratio (LDQR) and exchange rate (EXCH) were the exogenous variables and proxies for monetary policy. Data were obtained from the Central Bank of Nigeria’s Statistical Bulletin of various years and World Bank National Account Data. The study used descriptive statistics, performed a unit root test using Augmented Dickey-Fuller, Autoregressive Distributed Lag (ARDL) Bound test, and to test for causality, Toda Yamamoto was deployed. Finally, the Toda Yamamoto Causality test revealed that all the exogenous variables had bi-directional causality with economic growth except for the exchange rate that had uni-directional causality with economic growth. In the light of the findings, the study recommends that Broad Money Supply (MS2) should be adequately managed and manipulated to achieve the needy growth, in line with pursued monetary policy stance of the monetary authority. Also, the monetary authority and the government should vigorously pursue policies that would increase financial inclusion in Nigeria as it would enhance the effectiveness of the monetary policy.