This article applies the Bayesian Vector Auto-Regressive (BVAR) model
to key economic aggregates of the EU-7, consisting of the former narro
w-band ERM members plus Austria, and the EU-14. This model appears to
be useful as an additional forecasting tool besides structural macroec
onomic models, as is shown both by absolute forecasting performance an
d by a comparison of ex-post BVAR forecasts with forecasts by the OECD
. A comparison of the aggregate models to single-country models reveal
s that pooling has a strong impact on forecast errors. If forecast err
ors are interpreted as shocks, shocks appear to be-at least in part-as
ymmetric, or countries react differently to shocks. (C) 1998 John Wile
y & Sons, Ltd.