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Title: Should We Use Linearized Models To Calculate Fiscal Multipliers?

Author(s): Jesper Lindé and Mathias Trabandt

Publication Date: December 2017

Keyword(s): Fiscal policy, liquidity trap, monetary policy and zero lower bound

Programme Area(s): Monetary Economics and Fluctuations

Abstract: We calculate the magnitude of the government consumption multiplier in linearized and nonlinear solutions of a New Keynesian model at the zero lower bound. Importantly, the model is amended with real rigidities to simultaneously account for the macroeconomic evidence of a low Phillips curve slope and the microeconomic evidence of frequent price changes. We show that the nonlinear solution is associated with a much smaller multiplier than the linearized solution in long-lived liquidity traps, and pin down the key features in the model which account for the difference. Our results caution against the common practice of using linearized models to calculate fiscal multipliers in long-lived liquidity traps.

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Bibliographic Reference

Lindé, J and Trabandt, M. 2017. 'Should We Use Linearized Models To Calculate Fiscal Multipliers?'. London, Centre for Economic Policy Research. https://cepr.org/active/publications/discussion_papers/dp.php?dpno=12533