Policy Interaction, Expectation and Liquidity Trap

33 Pages Posted: 6 Aug 2003

See all articles by George W. Evans

George W. Evans

University of Oregon - Department of Economics; University of St. Andrews - School of Economics and Finance

Seppo Honkapohja

Centre for Economic Policy Research (CEPR); Aalto University School of Business; CESifo (Center for Economic Studies and Ifo Institute for Economic Research); Aalto University - School of Business

Date Written: June 2003

Abstract

We consider inflation and government debt dynamics when monetary policy employs a global interest rate rule and private agents forecast using adaptive learning. Because of the zero lower bound on interest rates, active interest rate rules are known to imply the existence of a second, low inflation steady state, below the target inflation rate. Under adaptive learning dynamics we find the additional possibility of a liquidity trap, in which the economy slips below this low inflation steady state and is driven to an even lower inflation floor that is supported by a switch to an aggressive money supply rule. Fiscal policy alone cannot push the economy out of the liquidity trap. Raising the threshold at which the money supply rule is employed can, however, dislodge the economy from the liquidity trap and ensure a return to the target equilibrium.

Keywords: Learning, deflation, economic policy

JEL Classification: E52, E58, E63

Suggested Citation

Evans, George W. and Honkapohja, Seppo and Honkapohja, Seppo, Policy Interaction, Expectation and Liquidity Trap (June 2003). Available at SSRN: https://ssrn.com/abstract=431760

George W. Evans (Contact Author)

University of Oregon - Department of Economics ( email )

1285 University of Oregon
Eugene, OR 97403
United States
541-346-4662 (Phone)
541-346-1243 (Fax)

University of St. Andrews - School of Economics and Finance ( email )

The Scores, Castlecliff
St. Andrews, Fife KY16 8RD
United Kingdom
44-1334-462435 (Phone)

HOME PAGE: http://www.st-andrews.ac.uk/economics/staff/pages.g.evans.shtml

Seppo Honkapohja

Centre for Economic Policy Research (CEPR)

London
United Kingdom

Aalto University School of Business ( email )

, PO Box 21210
Aalto FI-00076
Finland

CESifo (Center for Economic Studies and Ifo Institute for Economic Research)

Poschinger Str. 5
Munich, DE-81679
Germany

HOME PAGE: http://www.CESifo.de

Aalto University - School of Business

Finland

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