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Title: Challenges for Central Banks' Macro Models

Author(s): Jesper Lindé, Frank Smets and Rafael Wouters

Publication Date: July 2016

Keyword(s): and VAR models, DSGE, Financial Frictions, great recession, macroprudential policy, Monetary policy, Open economy, Regime-Switching and zero lower bound

Programme Area(s): Monetary Economics and Fluctuations

Abstract: In this paper we discuss a number of challenges for structural macroeconomic models in the light of the Great Recession and its aftermath. It shows that a benchmark DSGE model that shares many features with models currently used by central banks and large international institutions has difficulty explaining both the depth and the slow recovery of the Great Recession. In order to better account for these observations, the paper analyses three extensions of the benchmark model. First, we estimate the model allowing explicitly for the zero lower bound constraint on nominal interest rates. Second, we introduce time-variation in the volatility of the exogenous disturbances to account for the non-Gaussian nature of some of the shocks. Third and finally, we extend the model with a financial accelerator and allow for time-variation in the endogenous propagation of financial shocks. All three extensions require that we go beyond the linear Gaussian assumptions that are standard in most policy models. We conclude that these extensions go some way in accounting for features of the Great Recession and its aftermath, but they do not suffice to address some of the major policy challenges associated with the use of non-standard monetary policy and macroprudential policies.

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Bibliographic Reference

Lindé, J, Smets, F and Wouters, R. 2016. 'Challenges for Central Banks' Macro Models'. London, Centre for Economic Policy Research. https://cepr.org/active/publications/discussion_papers/dp.php?dpno=11405