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Fiscal Multipliers under an Interest Rate Peg of Deterministic versus Stochastic Duration

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  • CHARLES T. CARLSTROM
  • TIMOTHY S. FUERST
  • MATTHIAS PAUSTIAN

Abstract

This paper revisits the size of the fiscal multiplier. The experiment is a fiscal expansion under the assumption of a pegged nominal rate of interest. We demonstrate that a quantitatively important issue is the articulation of the exit from the policy experiment. If the monetary‐fiscal expansion is stochastic with a mean duration of T periods, the fiscal multiplier can be unboundedly large. However, if the monetary‐fiscal expansion is for a fixed T periods, the multiplier is much smaller. Our explanation rests on a Jensen's inequality type argument: the deterministic multiplier is convex in duration, and the stochastic multiplier is a weighted average of the deterministic multipliers. The quantitative difference in the two multipliers also arises in a model with capital, and in the baseline nonlinear model. However, the differences between the two are less pronounced in the nonlinear models. The errors from a linear approximation are much larger for the stochastic exit model then for the deterministic exit model.

Suggested Citation

  • Charles T. Carlstrom & Timothy S. Fuerst & Matthias Paustian, 2014. "Fiscal Multipliers under an Interest Rate Peg of Deterministic versus Stochastic Duration," Journal of Money, Credit and Banking, Blackwell Publishing, vol. 46(6), pages 1293-1312, September.
  • Handle: RePEc:wly:jmoncb:v:46:y:2014:i:6:p:1293-1312
    DOI: 10.1111/jmcb.12141
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    References listed on IDEAS

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    1. Carlstrom, Charles T. & Fuerst, Timothy S. & Paustian, Matthias, 2015. "Inflation and output in New Keynesian models with a transient interest rate peg," Journal of Monetary Economics, Elsevier, vol. 76(C), pages 230-243.
    2. Christopher Erceg & Jesper Lindé, 2014. "Is There A Fiscal Free Lunch In A Liquidity Trap?," Journal of the European Economic Association, European Economic Association, vol. 12(1), pages 73-107, February.
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