Continuous Time Versus Discrete Time in the New Keynesian Model: Closed-Form Solutions and Implications for Liquidity Trap

Lilia Maliar

No 13384, CEPR Discussion Papers from C.E.P.R. Discussion Papers

Abstract: Economists often use interchangeably the discrete- and continuous-time versions of the Keynesian model. In the paper, I ask whether or not the two versions effectively lead to the same implications. I analyze several alternative monetary policies, including a Taylor rule, discretionary interest rate choice and forward guidance. I show that the answer depends on a specific scenario and parameterization considered. In particular, in the presence of liquidity trap, the discrete-time analysis helps overcome some negative implications of the continuous-time model, such as excessively strong impact of price stickiness on inflation and output, unrealistically large government multipliers, as well as implausibly large effects of forward guidance.

Keywords: Forward guidance; Continuous time; New keynesian model; Zlb. liquidity trap; Closed-form solution (search for similar items in EconPapers)
JEL-codes: C61 C63 C68 E31 E52 (search for similar items in EconPapers)
Date: 2018-12
New Economics Papers: this item is included in nep-cba, nep-dge, nep-mac and nep-mon
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (4)

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