Method

The analysis for Granger agent works by aboriginal accomplishing a corruption of ΔY on lagged ethics of ΔY. (Here ΔY is the aboriginal aberration of the capricious Y — that is, Y bare its one-period-prior value. The regressions are performed in agreement of ΔY rather than Y if Y is not anchored but ΔY is.) Once the set of cogent lagged ethics for ΔY is begin (via t-statistics or p-values), the corruption is aggrandized with lagged levels of ΔX. Any accurate lagged amount of ΔX is retained in the corruption if (1) it is cogent according to a t-test, and (2) it and the added lagged ethics of ΔX accordingly add allegorical ability to the archetypal according to an F-test. Then the absent antecedent of no Granger agent is retained if and alone if no lagged ethics of ΔX accept been retained in the regression.

The researcher is generally attractive for a bright story, such as X Granger-causes Y but not the added way around. In practice, however, it may be begin that neither capricious Granger-causes the other, or that anniversary of the two variables Granger-causes the other.