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Coupling Cycle Mechanisms: Minsky debt cycles and the Multiplier-Accelerator

S Devrim Yilmaz and Engelbert Stockhammer ()
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S Devrim Yilmaz: AFD - Agence française de développement, CEPN - Centre d'Economie de l'Université Paris Nord - UP13 - Université Paris 13 - USPC - Université Sorbonne Paris Cité - CNRS - Centre National de la Recherche Scientifique

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Abstract: While there exists a substantial literature on different business cycle mechanisms, there is little literature on economies with more than one business cycle mechanism operating and the relation of stability of these subsystems with the stability of the aggregate system. We construct a model where a multiplier-accelerator subsystem in output-investment space (a real cycle) and a Minskyian subsystem in investment-debt space (a financial cycle) can generate stable/unstable cycles in 2D in isolation. We then derive a theorem showing that if two independent cycle mechanisms that generate stable closed orbits in 2D share a self-destabilizing common variable and the true representation of the system is a fully-coupled 3D system where a weighted average of the common variable is in effect, then the 3D system will generate locally stable closed orbits in 3D if and only if the subsystems have the same frequencies and/or the self-destabilizing effects of the common variable evaluated at the fixed point are equal in both subsystems. Our results indicate that in the presence of multiple cycle mechanisms which share common variables in an economy, the stability of the aggregate economy crucially depends on the frequencies of these sub-cycle mechanisms. Abstract While there exists a substantial literature on di¤erent business cycle mechanisms, there is little literature on economies with more than one business cycle mechanism operating and the relation of stability of these subsystems with the stability of the aggregate system. We construct a model where a multiplier-accelerator subsystem in output-investment space (a real cycle) and a Minskyian subsystem in investment-debt space (a …nancial cycle) can generate stable/unstable cycles in 2D in isolation. We then derive a theorem showing that if two independent cycle mechanisms that generate stable closed orbits in 2D share a self-destabilizing common variable and the true representation of the system is a fully-coupled 3D system where a weighted average of the common variable is in e¤ect, then the 3D system will generate locally stable closed orbits in 3D if and only if the subsystems have the same frequencies and/or the self-destabilizing e¤ects of the common variable evaluated at the …xed point are equal in both subsystems. Our results indicate that in the presence of multiple cycle mechanisms which share common variables in an economy, the stability of the aggregate economy crucially depends on the frequencies of these sub-cycle mechanisms.

Keywords: Business cycles; Minsky models; Multiplier-accelerator (search for similar items in EconPapers)
New Economics Papers: this item is included in nep-mac and nep-pke
Date: 2019-02-09
Note: View the original document on HAL open archive server: https://hal.archives-ouvertes.fr/hal-02012724
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Working Paper: Coupling cycle mechanisms: Minsky debt cycles and the multiplier-accelerator (2019) Downloads
Working Paper: Coupling Cycle Mechanisms: Minsky debt cycles and the Multiplier-Accelerator (2019) Downloads
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