A New Approach for Reconstruction of IMFs of Decomposition and Ensemble Model for Forecasting Crude Oil Prices

Table 2

Estimated parameters and their standard errors of the ARIMA models.

Data	Series	AR coefficients			MA coefficients
Brent	Daily	−0.029^1 (0.010)
	Weekly	0.911^1 (0.181)	−0.753^1 (0.115)		−0.908^1 (0.168)	0.792^1 (0.102)
WTI	Daily	−1.174^1 (0.053)	−0.907^1 (0.047)	−0.076^1 (0.013)	1.130^1 (0.052)	0.809^1 (0.050)
	Weekly	0.603^1 (0.035)	0.242^1 (0.026)	0.224^1 (0.022)	−0.675^1 (0.033)	−0.200^1 (0.034)	−0.161^1 (0.031)
		0.663^1 (0.027)	−0.875^1 (0.032)		−0.631^1 (0.034)	0.857^1 (0.031)

¹ value less than 0.01.