IDEAS home Printed from
MyIDEAS: Log in (now much improved!) to save this article

Fiscal Sustainability in a New Keynesian Model


Most recent work deriving optimal monetary policy utilising New Neo-Classical Synthesis (NNCS) models abstract from the impact of monetary policy on the government’s finances, by assuming the existence of lump sum taxes. In this paper, we assume that the government does not have access to such taxes to satisfy its intertemporal budget constraint in the face of shocks. We then consider optimal monetary and fiscal policies under discretion and commitment in the face of technology, preference and cost-push shocks. We find that the optimal precommitment policy implies a random walk in the steady-state level of debt, generalising earlier results that involved only a single fiscal instrument. We also find that the time-inconsistency in the optimal precommitment policy is such that governments are tempted, given inflationary expectations, to utilise their monetary and fiscal instruments in the initial period to change the ultimate debt burden they need to service. We show that this temptation is only eliminated if following shocks, the new steady-state debt is equal to the original (efficient) debt level. This implies that under a discretionary policy the random walk result is overturned: debt will always be returned to this initial steady-state even although there is no explicit debt target in the government’s objective function. Analytically and in a series of numerical simulations we show which instrument is used to stabilise the debt depends crucially on the degree of nominal inertia and the size of the debt-stock. We also show that the welfare consequences of introducing debt are negligible for precommitment policies, but can be significant for discretionary policy.

(This abstract was borrowed from another version of this item.)

If you experience problems downloading a file, check if you have the proper application to view it first. In case of further problems read the IDEAS help page. Note that these files are not on the IDEAS site. Please be patient as the files may be large.

File URL:
Download Restriction: Access to full text is restricted to subscribers.

As the access to this document is restricted, you may want to look for a different version under "Related research" (further below) or search for a different version of it.

Article provided by Blackwell Publishing in its journal Journal of Money, Credit and Banking.

Volume (Year): 45 (2013)
Issue (Month): 8 (December)
Pages: 1477-1516

in new window

Handle: RePEc:mcb:jmoncb:v:45:y:2013:i:8:p:1477-1516
Contact details of provider: Web page:

References listed on IDEAS
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.:

as in new window
  1. Obstfeld, Maurice, 1997. "Dynamic Seigniorage Theory," Macroeconomic Dynamics, Cambridge University Press, vol. 1(03), pages 588-614, September.
  2. Benigno, Pierpaolo & Woodford, Michael, 2004. "Optimal monetary and fiscal policy: a linear-quadratic approach," Working Paper Series 0345, European Central Bank.
  3. Martin Ellison & Neil Rankin, 2005. " Optimal Monetary Policy When Lump-Sum Taxes Are Unavailable: A Reconsideration of the Outcomes under Commitment and Discretion," CDMA Conference Paper Series 0501, Centre for Dynamic Macroeconomic Analysis.
  4. Campbell Leith & Simon Wren-lewis, 2006. "The Costs of Fiscal Inflexibility," WEF Working Papers 0005, ESRC World Economy and Finance Research Programme, Birkbeck, University of London.
  5. Barro, Robert J, 1979. "On the Determination of the Public Debt," Journal of Political Economy, University of Chicago Press, vol. 87(5), pages 940-71, October.
  6. Beetsma, Roel & Jensen, Henrik, 2003. "Mark-Up Fluctuations and Fiscal Policy Stabilization in a Monetary Union," CEPR Discussion Papers 4020, C.E.P.R. Discussion Papers.
  7. Lombardo, Giovanni & Sutherland, Alan, 2003. "Monetary and fiscal interactions in open economies," Working Paper Series 0289, European Central Bank.
  8. Maurice Obstfeld and ., 1997. "Dynamic Seigniorage Theory: An Exploration," Center for International and Development Economics Research (CIDER) Working Papers C97-085, University of California at Berkeley.
  9. Smets, Frank & Wouters, Rafael, 2004. "Comparing Shocks and Frictions in US and Euro Area Business Cycles: A Bayesian DSGE Approach," CEPR Discussion Papers 4750, C.E.P.R. Discussion Papers.
  10. Calvo, Guillermo A., 1983. "Staggered prices in a utility-maximizing framework," Journal of Monetary Economics, Elsevier, vol. 12(3), pages 383-398, September.
  11. Leith, Campbell & Wren-Lewis, Simon, 2000. "Interactions between Monetary and Fiscal Policy Rules," Economic Journal, Royal Economic Society, vol. 110(462), pages C93-108, March.
  12. Soderlind, Paul, 1999. "Solution and estimation of RE macromodels with optimal policy," European Economic Review, Elsevier, vol. 43(4-6), pages 813-823, April.
  13. V. V. Chari & Lawrence J. Christiano & Patrick J. Kehoe, 1991. "Optimal fiscal and monetary policy: some recent results," Staff Report 147, Federal Reserve Bank of Minneapolis.
  14. Leith, Campbell & Malley, Jim, 2005. "Estimated general equilibrium models for the evaluation of monetary policy in the US and Europe," European Economic Review, Elsevier, vol. 49(8), pages 2137-2159, November.
  15. Leith, Campbell & Wren-Lewis, Simon, 2006. "Compatibility between monetary and fiscal policy under EMU," European Economic Review, Elsevier, vol. 50(6), pages 1529-1556, August.
  16. Richard Clarida & Jordi Gali & Mark Gertler, 2001. "Optimal Monetary Policy in Open versus Closed Economies: An Integrated Approach," American Economic Review, American Economic Association, vol. 91(2), pages 248-252, May.
  17. Peter N. Ireland, 2004. "Technology Shocks in the New Keynesian Model," The Review of Economics and Statistics, MIT Press, vol. 86(4), pages 923-936, November.
  18. Bernheim, B Douglas, 1991. "Optimal Fiscal and Monetary Policy: Some Recent Results," Journal of Money, Credit and Banking, Blackwell Publishing, vol. 23(3), pages 540-42, August.
  19. Obstfeld, Maurice, 1997. "Dynamic Seigniorage Theory: An Exploration," Center for International and Development Economics Research (CIDER) Working Papers 233606, University of California-Berkeley, Department of Economics.
Full references (including those not matched with items on IDEAS)

This item is not listed on Wikipedia, on a reading list or among the top items on IDEAS.

When requesting a correction, please mention this item's handle: RePEc:mcb:jmoncb:v:45:y:2013:i:8:p:1477-1516. 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: (Wiley-Blackwell Digital Licensing)

or (Christopher F. Baum)

If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.

If references are entirely missing, you can add them using this form.

If the full references list an item that is present in RePEc, but the system did not link to it, you can help with this form.

If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your profile, as there may be some citations waiting for confirmation.

Please note that corrections may take a couple of weeks to filter through the various RePEc services.

This information is provided to you by IDEAS at the Research Division of the Federal Reserve Bank of St. Louis using RePEc data.