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Dealing with misspecification in structural macroeconometric models

Fabio Canova and Christian Matthes

Quantitative Economics, 2021, vol. 12, issue 2, 313-350

Abstract: We consider a set of potentially misspecified structural models, geometrically combine their likelihood functions, and estimate the parameters using composite methods. In a Monte Carlo study, composite estimators dominate likelihood‐based estimators in mean squared error and composite models are superior to individual models in the Kullback–Leibler sense. We describe Bayesian quasi‐posterior computations and compare our approach to Bayesian model averaging, finite mixture, and robust control procedures. We robustify inference using the composite posterior distribution of the parameters and the pool of models. We provide estimates of the marginal propensity to consume and evaluate the role of technology shocks for output fluctuations.

Date: 2021
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Handle: RePEc:wly:quante:v:12:y:2021:i:2:p:313-350