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Debt and the effects of fiscal policy

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  • Carlo Favero
  • Francesco Giavazzi

Abstract

A fiscal shock due to a shift in taxes or in government spending will, at some point in time, constrain the future path of taxes and spending, since the government’s intertemporal budget constraint will eventually have to be met. This simple fact is surprisingly overlooked in analyses of the effects of fiscal policy based on vector autoregressive models. We study the effects of fiscal shocks, keeping track of the debt dynamics that arise following a fiscal shock and allowing for the possibility that taxes, spending, and interest rates might respond to the level of the debt as it evolves over time. We show that the absence of a debt feedback effect can result in incorrect estimates of the dynamic effects of fiscal shocks. In particular, omitting an effect of fiscal shocks on long-term interest rates—a frequent finding in studies that omit a debt feedback—can be explained by the misspecification of these fiscal shocks. Using data for the U.S. economy and two alternative identification assumptions, we reconsider the effects of fiscal policy shocks, correcting for these shortcomings. We close the paper by observing that the methodology described by taking into account the stock-flow relationship between debt and fiscal variables to analyze the impact of fiscal shocks could also be applied to other dynamic models that include similar identities. The inclusion of capital as a slow-moving variable in the study of the relationship between productivity shocks and hours worked is one example.

Suggested Citation

  • Carlo Favero & Francesco Giavazzi, 2007. "Debt and the effects of fiscal policy," Working Papers 07-4, Federal Reserve Bank of Boston.
  • Handle: RePEc:fip:fedbwp:07-4
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    References listed on IDEAS

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    1. Chari, V.V. & Kehoe, Patrick J. & McGrattan, Ellen R., 2008. "Are structural VARs with long-run restrictions useful in developing business cycle theory?," Journal of Monetary Economics, Elsevier, vol. 55(8), pages 1337-1352, November.
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    3. Roberto Perotti, 2008. "In Search of the Transmission Mechanism of Fiscal Policy," NBER Chapters,in: NBER Macroeconomics Annual 2007, Volume 22, pages 169-226 National Bureau of Economic Research, Inc.
    4. Wendy Edelberg & Martin Eichenbaum & Jonas D.M. Fisher, 1999. "Understanding the Effects of a Shock to Government Purchases," Review of Economic Dynamics, Elsevier for the Society for Economic Dynamics, vol. 2(1), pages 166-206, January.
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    10. Fatás, Antonio & Mihov, Ilian, 2001. "The Effects of Fiscal Policy on Consumption and Employment: Theory and Evidence," CEPR Discussion Papers 2760, C.E.P.R. Discussion Papers.
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    More about this item

    Keywords

    Debt ; Fiscal policy;

    JEL classification:

    • E62 - Macroeconomics and Monetary Economics - - Macroeconomic Policy, Macroeconomic Aspects of Public Finance, and General Outlook - - - Fiscal Policy
    • H60 - Public Economics - - National Budget, Deficit, and Debt - - - General

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