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Comparing Models of Macroeconomic Fluctuations: How Big Are the Differences?

Ghent, Andra (2006): Comparing Models of Macroeconomic Fluctuations: How Big Are the Differences?

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Abstract

I generate priors for a VAR from four competing models of economic fluctuations: a standard RBC model, Fisher’s (2006) investment-specific technology shocks model, an RBC model with capital adjustment costs and habit formation, and a sticky price model with an unaccommodating monetary authority. I compare the accuracy of the forecasts made with each of the resulting VARs. The economic models generate similar forecast errors to one another. However, at horizons of one to two years and greater, the models generally yield superior forecasts to those made using both an unrestricted VAR and a VAR that uses shrinkage from a Minnesota prior.

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