From Sunspots to Black Holes: Singular dynamics in macroeconomic models

Paulo Brito (), Luis Costa and Huw Dixon

No E2016/6, Cardiff Economics Working Papers from Cardiff University, Cardiff Business School, Economics Section

Abstract: We present conditions for the emergence of singularities in DGE models. We distinguish between slow-fast and impasse singularity types, review geometrical methods to deal with both types of singularity and apply them to DGE dynamics. We find that impasse singularities can generate new types of DGE dynamics, in particular temporary determinacy/indeterminacy. We illustrate the different nature of the two types of singularities and apply our results to two simple models: the Benhabib and Farmer (1994) model and one with a cyclical fiscal policy rule.

Keywords: slow-fast singularities; impasse singularities; macroeconomic dynamics; temporary indeterminacy (search for similar items in EconPapers)
JEL-codes: C62 D43 E32 (search for similar items in EconPapers)
Pages: 35 pages
Date: 2016-06
New Economics Papers: this item is included in nep-ger, nep-hpe and nep-mac
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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Related works:
Chapter: From Sunspots to Black Holes: Singular Dynamics in Macroeconomic Models (2017)
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Persistent link: https://EconPapers.repec.org/RePEc:cdf:wpaper:2016/6

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