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World edible oil prices prediction: Evidence from mix effect of ever difference on Box-Jenkins approach
Abdul Aziz Karia • Taufik Abd Hakim • Imbarine Bujang
Volume 10 Issue 3 · 17 Jul 2016
The Box-Jenkins model assumed that the time series is stationary. Generally, researchers will conduct the first order difference as a necessary procedure of stationarity data. The first or second order difference seems…