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Measuring Uncertainty of a Combined Forecast and Some Tests for Forecaster Heterogeneity

Kajal Lahiri (), Huaming Peng () and Xuguang Simon Sheng ()
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Huaming Peng: Rensselaer Polytechnic Institute

No 2021-005, Working Papers from The George Washington University, Department of Economics, H. O. Stekler Research Program on Forecasting

Abstract: From the standpoint of a policy maker who has access to a number of expert forecasts, the uncertainty of a combined or ensemble forecast should be interpreted as that of a typical forecaster randomly drawn from the pool. This uncertainty formula should incorporate forecaster discord, as justified by (i) disagreement as a component of combined forecast uncertainty, (ii) the model averaging literature and (iii) central banks’ communication of uncertainty via fan charts. Using new statistics to test for the homogeneity of idiosyncratic errors under the joint limits with both T and n approaching infinity simultaneously, we find that some previously used measures can significantly underestimate the conceptually correct benchmark forecast uncertainty.

Keywords: Central Bank Communication; Disagreement; Ensemble; Forecast Combination; Panel Data; Uncertainty (search for similar items in EconPapers)
JEL-codes: C12 C33 E37 (search for similar items in EconPapers)
Pages: 35 pages
Date: 2021-08
New Economics Papers: this item is included in nep-for, nep-isf and nep-mac
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https://www2.gwu.edu/~forcpgm/2021-005.pdf First version, 2021 (application/pdf)

Related works:
Working Paper: Measuring Uncertainty of a Combined Forecast and Some Tests for Forecaster Heterogeneity (2020) Downloads
Working Paper: Measuring Uncertainty of a Combined Forecast and Some Tests for Forecaster Heterogeneity (2015) Downloads
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