This prior is chosen to match the predictions of survey respondents. In particular, the unconditional mean for each series in the vector autoregression is centered around long-horizon survey forecasts. Heavy shrinkage toward the democratic prior is found to give good real-time predictions of a range of macroeconomic variables, as these survey projections are good at quickly capturing endpoint-shifts.
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Working Paper
Evaluating Real-Time VAR Forecasts with an Informative Democratic Prior
May 2010
WP 10-19 – This paper proposes Bayesian forecasting in a vector autoregression using a democratic prior.