Decomposing Granger Causality over the Spectrum

We develop a bivariate spectral Granger-causality test that can be applied at each individual frequency of the spectrum. The spectral approach to Granger causality has the distinct advantage that it allows to disentangle (potentially) di®erent Granger- causality relationships over di®erent time horizons. We illustrate the usefulness of the proposed approach in the context of the predictive value of European production expectation surveys.