Reconsideration of the IS–LM model and limitations of monetary policy: a Tobin–Minsky model

Toshio Watanabe ()
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Toshio Watanabe: Fukui Prefectural University

Evolutionary and Institutional Economics Review, 2021, vol. 18, issue 1, No 6, 103-129

Abstract: Abstract The standard IS–LM model considers all types of financial assets, excluding money, as bonds. We construct a modified IS–LM model to better represent the characteristics of financial markets and investigate the stability of the economy. We present bank behavior explicitly and consider household portfolio preferences through the rate of return on financial assets. We build both static and dynamic models that incorporate the dynamic equation of monetary policy. In our model, an increase in the debt–capital ratio may have a negative impact on the profit rate and bring about the so-called “paradox of debt.” We indicate that factors such as the sensitivity of bank lending to the profit rate and the degree of substitutability between the household’s equity and money have a significant effect on the volatility of the profit rate and equity price. Particularly, the latter may lead to an unstable economy in the long run. We show that it is always possible for the economy to become unstable endogenously. The government and central bank must formulate loan regulations and adopt the appropriate monetary policy to stabilize the economy.

Keywords: Financial instability hypothesis; Portfolio selection; Debt–capital ratio; Monetary policy (search for similar items in EconPapers)
JEL-codes: E12 E44 E52 (search for similar items in EconPapers)
Date: 2021
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DOI: 10.1007/s40844-020-00189-8

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