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Liquidity Traps and Expectation Dynamics: Fiscal Stimulus or Fiscal Austerity?

  • Jess Benhabib
  • George W. Evans
  • Seppo Honkapohja

We examine global dynamics under infinite-horizon learning in New Keynesian models where the interest-rate rule is subject to the zero lower bound. As in Evans, Guse and Honkapohja (2008), the intended steady state is locally but not globally stable. Unstable deflationary paths emerge after large pessimistic shocks to expectations. For large expectation shocks that push interest rates to the zero bound, a temporary fiscal stimulus or a policy of fiscal austerity, appropriately tailored in magnitude and duration, will insulate the economy from deflation traps. However "fiscal switching rules" that automatically kick in without discretionary fine tuning can be equally effective.

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Paper provided by National Bureau of Economic Research, Inc in its series NBER Working Papers with number 18114.

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Date of creation: May 2012
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Publication status: published as “Liquidity Traps and Expectation Dynamics: Fiscal Stimulus or Fiscal Austerity?,” (with George Evans and Seppo Honkapohja), forthcoming, Journal of Economic Dynamics and Control, 2015.
Handle: RePEc:nbr:nberwo:18114
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