A transparent approach to solving linear rational expectation models

Abstract This paper proposes a simple iterative method—time iteration—to solve linear rational expectation models. I prove that this method converges to the desired stable solution, and provide the conditions under which the solution is unique. Apart from its transparency and simplicity of implementation, the method provides a straightforward approach to solving models with less standard features, such as regime‐switching frameworks in which constraints may occasionally bind—for example, the zero lower bound.

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Publication Details

Journal
Economica
Published
2025-06-22
DOI
https://doi.org/10.1111/ecca.70001
Primary Topic
Monetary Policy and Economic Impact
Type
article
Field-Weighted Citation Impact
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article

A transparent approach to solving linear rational expectation models

Pontus Rendahl
Economica
Monetary Policy and Economic Impact
article

A transparent approach to solving linear rational expectation models

Pontus Rendahl
article en

Abstract

Abstract This paper proposes a simple iterative method—time iteration—to solve linear rational expectation models. I prove that this method converges to the desired stable solution, and provide the conditions under which the solution is unique. Apart from its transparency and simplicity of implementation, the method provides a straightforward approach to solving models with less standard features, such as regime‐switching frameworks in which constraints may occasionally bind—for example, the zero lower bound.

EconomicaVol. 92(368)
Copenhagen Business School (DK)
Openalex Percentile: Top 77%
Monetary Policy and Economic Impact
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A transparent approach to solving linear rational expectation models — Pontus Rendahl · Economica (2025) | TGRS Research Map | TGRS