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http://dx.doi.org/10.12939/FBA.2021.52.4.013

A Comparison of Predictive Power among Forecasting Models of Monthly Frozen Mackerel Consumer Price Models  

Jeong, Min-Gyeong (Department of Resource and Environmental Economics, Graduate School, Pukyong National University)
Nam, Jong-Oh (Division of Economics, College of Humanities & Social Sciences, Pukyong National University)
Publication Information
The Journal of Fisheries Business Administration / v.52, no.4, 2021 , pp. 13-28 More about this Journal
Abstract
The purpose of this study is to compare short-term price predictive power among ARMA ARMAX and VAR forecasting models based on the MDM test using monthly consumer price data of frozen mackerel. This study also aims to help policymakers and economic actors make reasonable choices in the market on monthly consumer price of frozen mackerel. To analyze this study, the frozen wholesale prices and new consumer prices were used as variables while the price time series data were used from December 2013 to July 2021. Through the unit root test, it was confirmed that the time series variables employed in the models were stable while the level variables were used for analysis. As a result of conducting information standards and Granger causality tests, it was found that the wholesale prices and fresh consumer prices from the previous month have affected the frozen consumer prices. Then, the model with the highest predictive power was selected by RMSE, RMSPE, MAE, MAPE, and Theil's inequality coefficient criteria where the predictive power was compared by the MDM test in order to examine which model is superior. As a result of the analysis, ARMAX(1,1) with the frozen wholesale, ARMAX(1,1) with the fresh consumer model and VAR model were selected. Through the five criteria and MDM tests, the VAR model was selected as the superior model in predicting the monthly consumer price of frozen mackerel.
Keywords
Mackerel; ARMA; ARMAX; VAR; Predictive Power;
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