Authors: Olaitan Rafiu Olasunkanmi; Olajide Sunday Oladipo
Addresses: Statistics Department, Central Bank of Nigeria, Abuja, 900211, Nigeria ' Economic Development Division, National Institute for Legislative and Democratic Studies (National Assembly), Abuja, 900271, Nigeria
Abstract: This paper investigates factors (domestic and external) affecting inflation in Nigeria using the seasonal autoregressive integrated moving average with additional explanatory variables (SARIMA-X) due to the predictability of past series inflation and the embedded seasonal nature of inflation in Nigeria. The study estimated and evaluated three models for the variant of inflation (headline, food and core) and confirmed the interaction of the filtering effects of external and domestic factors affecting inflation in Nigeria. The paper noted that average fuel premium motor spirits (PMS) prices, total rainfall and any shocks to either food and core inflation or both has an instantaneous impact on the headline inflation with the external factor effect on fuel prices measured by bureau-de-change (BDC) Naira (N/$) exchange rate being significant.
Keywords: CPI; consumer price index; SARIMA; seasonal autoregressive integrated moving average; SARIMAX processes; inflation rate; food inflation; headline inflation; Nigeria.
International Journal of Monetary Economics and Finance, 2020 Vol.13 No.6, pp.545 - 568
Published online: 23 Dec 2020 *Full-text access for editors Access for subscribers Purchase this article Comment on this article