Assessing Forecast Uncertainties in a VECX Model for Switzerland: An Exercise in Forecast Combination Across Models and Observation Windows
58 Pages Posted: 16 Oct 2007
Date Written: October 2007
We investigate the effect of forecast uncertainty in a cointegrating vector error correction model for Switzerland. Forecast uncertainty is evaluated in three different dimensions. First, we investigate the effect on forecasting performance of averaging over forecasts from different models. Second, we look at different estimation windows. We find that averaging over estimation windows is at least as effective as averaging over different models and both complement each other. Third, we explore whether using weighting schemes from the machine learning literature improves the average forecast. Compared to equal weights the effect of the weighting scheme on forecast accuracy is small in our application.
Keywords: Bayesian model averaging, choice of observation window, long-run structural vector autoregression
JEL Classification: C53, C32
Suggested Citation: Suggested Citation