Managing a Liquidity Trap: Monetary and Fiscal Policy
I study monetary and fiscal policy in liquidity trap scenarios, where the zero bound on the nominal interest rate is binding. I work with a continuous-time version of the standard New Keynesian model. Without commitment, the economy suffers from deflation and depressed output. I show that, surprisingly, both are exacerbated with greater price flexibility. I examine monetary and fiscal policies that maximize utility for the agent in the model and refer to these as optimal throughout the paper. I find that the optimal interest rate is set to zero past the liquidity trap and jumps discretely up upon exit. Inflation may be positive throughout, so the absence of deflation is not evidence against a liquidity trap. Output, on the other hand, always starts below its efficient level and rises above it. I then study fiscal policy and show that, regardless of parameters that govern the value of "fiscal multipliers" during normal or liquidity trap times, at the start of a liquidity trap optimal spending is above its natural level. However, it declines over time and goes below its natural level. I propose a decomposition of spending according to "opportunistic" and "stimulus" motives. The former is defined as the level of government purchases that is optimal from a static, cost-benefit standpoint, taking into account that, due to slack resources, shadow costs may be lower during a slump; the latter measures deviations from the former. I show that stimulus spending may be zero throughout, or switch signs, depending on parameters. Finally, I consider the hybrid where monetary policy is discretionary, but fiscal policy has commitment. In this case, stimulus spending is typically positive and increasing throughout the trap.
|Date of creation:||Aug 2011|
|Date of revision:|
|Contact details of provider:|| Postal: National Bureau of Economic Research, 1050 Massachusetts Avenue Cambridge, MA 02138, U.S.A.|
Web page: http://www.nber.org
More information through EDIRC
Please report citation or reference errors to , or , if you are the registered author of the cited work, log in to your RePEc Author Service profile, click on "citations" and make appropriate adjustments.:
- Adam, Klaus & Billi, Roberto M., 2004.
"Optimal monetary policy under commitment with a zero bound on nominal interest rates,"
CFS Working Paper Series
2004/13, Center for Financial Studies (CFS).
- Adam, Klaus & Billi, Roberto M., 2006. "Optimal Monetary Policy under Commitment with a Zero Bound on Nominal Interest Rates," Journal of Money, Credit and Banking, Blackwell Publishing, vol. 38(7), pages 1877-1905, October.
- Klaus Adam & Roberto M. Billi, 2005. "Optimal monetary policy under commitment with a zero bound on nominal interest rates," Research Working Paper RWP 05-07, Federal Reserve Bank of Kansas City.
- Adam, Klaus & Billi, Roberto M., 2004. "Optimal monetary policy under commitment with a zero bound on nominal interest rates," Working Paper Series 0377, European Central Bank.
- Adam, Klaus & Billi, Roberto M, 2003. "Optimal Monetary Policy Under Commitment with a Zero Bound on Nominal Interest Rates," CEPR Discussion Papers 4111, C.E.P.R. Discussion Papers.
- Roberto M. Billi & Klaus Adam, 2004. "Optimal Monetary Policy under Commitment with a Zero Bound on Nominal Interest Rates," Computing in Economics and Finance 2004 67, Society for Computational Economics.
- Richard Clarida & Jordi Gali & Mark Gertler, 1999.
"The Science of Monetary Policy: A New Keynesian Perspective,"
NBER Working Papers
7147, National Bureau of Economic Research, Inc.
- Mark Gertler & Jordi Gali & Richard Clarida, 1999. "The Science of Monetary Policy: A New Keynesian Perspective," Journal of Economic Literature, American Economic Association, vol. 37(4), pages 1661-1707, December.
- Richard Clarida & Jordi Galí & Mark Gertler, 1997. "The science of monetary policy: A new Keynesian perspective," Economics Working Papers 356, Department of Economics and Business, Universitat Pompeu Fabra, revised Apr 1999.
- Clarida, Richard & Galí, Jordi & Gertler, Mark, 1999. "The Science of Monetary Policy: A New Keynesian Perspective," CEPR Discussion Papers 2139, C.E.P.R. Discussion Papers.
- Clarida, R. & Gali, J. & Gertler, M., 1999. "The Science of Monetary Policy: A New Keynesian Perspective," Working Papers 99-13, C.V. Starr Center for Applied Economics, New York University.
- Olivier Blanchard & Giovanni Dell'Ariccia & Paolo Mauro, 2010.
"Rethinking Macroeconomic Policy,"
Journal of Money, Credit and Banking,
Blackwell Publishing, vol. 42(s1), pages 199-215, 09.
- Lawrence Christiano & Martin Eichenbaum & Sergio Rebelo, 2009.
"When is the government spending multiplier large?,"
NBER Working Papers
15394, National Bureau of Economic Research, Inc.
- Jung, Taehun & Teranishi, Yuki & Watanabe, Tsutomu, 2005. "Optimal Monetary Policy at the Zero-Interest-Rate Bound," Journal of Money, Credit and Banking, Blackwell Publishing, vol. 37(5), pages 813-35, October.
When requesting a correction, please mention this item's handle: RePEc:nbr:nberwo:17344. See general information about how to correct material in RePEc.
For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: ()
If references are entirely missing, you can add them using this form.