International Review of Economics

, Volume 54, Issue 1, pp 53–65 | Cite as

Stability and bifurcations in IS-LM economic models

  • Umberto Neri
  • Beatrice Venturi


In this note, we analyze the local dynamics of a general non-linear fixedprice disequilibrium IS-LM model. We assume investment behavior as a general nonlinear function avoiding any Kaldor type assumption. By proving the existence of a family of periodic solutions bifurcating from a steady state, we confirm and extend some results in the literature for IS-LM models reducible to Leinard’s equation. We use bifurcation theory and study the effect of a change of the adjustment parameter in the money market upon the solutions of the model as the steady state loses stability.

We establish analytically that the values of the adjustment parameter in the money market may affect the equilibrium relative to the product market and the government budget constraint. (JEL: C62, E32)


deterministic cycles Hopf bifurcations stability of periodic orbits 


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© Springer-Verlag 2007

Authors and Affiliations

  1. 1.Department of MathematicsUniversity of MarylandCollege ParkU.S.A.
  2. 2.Department of EconomicsUniversity of CagliariCagliariItaly

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