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The Role of Nonlinearity in Indeterminate Models: An Application to Expectations-Driven Liquidity Traps

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  • Yoichiro Tamanyu

    (Graduate School of Economics, Keio University)

Abstract

This paper proposes a novel methodology to derive nonlinear solutions of an indeterminate DSGE model in which the decision rules are affected by sunspot shocks. We apply the method to an expectations-driven liquidity trap---a liquidity trap that arises because of the zero lower bound constraint on the nominal interest rate and the de-anchoring of economic agents' expectations---and find that the model dynamics exhibit significant nonlinearity. Such nonlinearity arises because the zero lower bound ceases to bind once the inflation rate rises because of a temporary increase in inflation expectations.

Suggested Citation

  • Yoichiro Tamanyu, 2020. "The Role of Nonlinearity in Indeterminate Models: An Application to Expectations-Driven Liquidity Traps," Keio-IES Discussion Paper Series 2020-023, Institute for Economics Studies, Keio University.
  • Handle: RePEc:keo:dpaper:2020-023
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    References listed on IDEAS

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    More about this item

    Keywords

    Indeterminacy; Nonlinearity; Sunspot; Expectations-Driven Liquidity Traps; Zero Lower Bound;
    All these keywords.

    JEL classification:

    • C62 - Mathematical and Quantitative Methods - - Mathematical Methods; Programming Models; Mathematical and Simulation Modeling - - - Existence and Stability Conditions of Equilibrium
    • C63 - Mathematical and Quantitative Methods - - Mathematical Methods; Programming Models; Mathematical and Simulation Modeling - - - Computational Techniques
    • E31 - Macroeconomics and Monetary Economics - - Prices, Business Fluctuations, and Cycles - - - Price Level; Inflation; Deflation

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