Working Paper: NBER ID: w20575
Authors: Marco Del Negro; Raiden B. Hasegawa; Frank Schorfheide
Abstract: We provide a novel methodology for estimating time-varying weights in linear prediction pools, which we call Dynamic Pools, and use it to investigate the relative forecasting performance of DSGE models with and without financial frictions for output growth and inflation from 1992 to 2011. We find strong evidence of time variation in the pool's weights, reflecting the fact that the DSGE model with financial frictions produces superior forecasts in periods of financial distress but does not perform as well in tranquil periods. The dynamic pool's weights react in a timely fashion to changes in the environment, leading to real-time forecast improvements relative to other methods of density forecast combination, such as Bayesian Model Averaging, optimal (static) pools, and equal weights. We show how a policymaker dealing with model uncertainty could have used a dynamic pools to perform a counterfactual exercise (responding to the gap in labor market conditions) in the immediate aftermath of the Lehman crisis.
Keywords: forecasting; financial frictions; DSGE models; dynamic prediction pools
JEL Codes: C53; E31; E32; E37
Edges that are evidenced by causal inference methods are in orange, and the rest are in light blue.
| Cause | Effect |
|---|---|
| Financial conditions (E66) | Forecasting performance (SWFF) (G17) |
| Economic environment (E66) | Model efficacy (SW) (C52) |
| Dynamic pools (C69) | Improved forecasts (C53) |
| Model selection (C52) | Policy effectiveness (D78) |
| Economic conditions (E66) | Dynamic response of model weights (C69) |