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Research background: There is no consensus among scholars on the interaction effect between money supply, price, and wages despite various studies conducted to that effect. Purpose: This study investigates whether the neutrality of money assumption holds in the long run in Nigeria, using annual data from 1970 to 2018. Research methodology: The study utilized the Johansen cointegration test and the Vector Error Correction (VECM) approach for estimation. Results: The results from the Phillips curve model contradict the classical school of economics assumption that money is neutral in the long run. This implies that in the Nigerian economy, money is not neutral in the long run. The long run Fishers’ effect model shows that the coefficient of LOG (CPI) exhibits a negative sign and is statistically significant at a 5% significant level, thus contradicting the hypothesis which states that a one percent increase in consumer prices will lead to an increase in the rate of interest by one percent. The coefficient of nominal money supply indicates a negative sign and insignificant statistically on the interest rate. The Short-run estimated results showed that the coefficient of the error correction term ECM (–1) indicates a negative sign and is significant statistically in the Fishers’ effect model. The result shows the actual and equilibrium values are corrected with adjustment speeds equal to 31% yearly. Novelty: The study recommends that the Central Bank of Nigeria should ensure an effective implementation of monetary targeting measures in fine-tuning the economy and curbing inflationary pressures.

Research background: Output volatility has potentially adverse consequences on the economy and the stabilizing role of fiscal policy is linked to the share of government size in an economy. Hence, given the relative large share of government in developing countries, government size is expected to play an important role in stabilizing output volatility. Purpose: This study examines the relationship between output volatility and government size in Nigeria. The study seeks to establish if government size mitigates output volatility in Nigeria. Research methodology: The study employs the Autoregressive Distributed Lag (ARDL) technique after conducting stationarity and co-integration tests. Results: The results of the ARDL estimate showed that government size lessens output volatility but the magnitude was insignificant. Further, the study found that volatility in aggregate government spending; international oil price and public debt were significant determinants of output volatility in Nigeria. Novelty: This showed that the automatic stabilization role of government size on output volatility could not be established. The automatic stabilization role of fiscal policy can be improved by increasing social security transfers (pension payment), payments of unemployment benefits and increasing civil servants minimum wage.

Research background: The need for diversification of the Nigerian economy has been emphasized and the manufacturing sector has a major role in this. Being an oil producing country, monetary policy is an important macroeconomic policy that has always been used to manage the influence of oil price shock on the manufacturing sector. Purpose: The study examines the relationship between oil price shock, the monetary transmission mechanism and manufacturing output growth in Nigeria. Research methodology: The study applied the structural vector auto regression (SVAR) modelling technique and a descriptive analysis. Results: The results of the study show that the exchange rate is mostly affected by the oil price shock, while the monetary policy instruments and inflation rate are also very responsive to the exchange rate shock. The manufacturing sector output growth has also been shown to be strongly affected by the inflation rate and monetary policy shocks. Novelty: The study has revealed the most effective channel via which oil price shocks affect manufacturing output. The exchange rate channel of the monetary policy transmission mechanism is the most significant channel through which oil price shock affects manufacturing output growth in Nigeria. This shows that effective management of the exchange rate policy via the appropriate monetary policy approach can be used to minimize the adverse effect of oil price shocks on Nigerian manufacturing output.