Equation (7) indicates short-run adjustment toward long-run equilibrium with the change
in oil prices at the same period and others, manufacturing production index and imported price in term of dollar. No autocorrelation is specified in this model at 0.05 level
of signicance. Coeffcient of adjustment is -0.1406, which means the error correction
process will take place from the actual value to the long-run equilibrium by 0.1406 in
each period or each month).