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A two-sector model of the business cycle: a preliminary analysis

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  • G. Gozzi
  • F. Nardini

Abstract

In this paper a two-sector dynamic model of business fluctuations is presented. It is a disequilibrium dynamic model with two laws of evolution (dynamic laws) built into it: prices of commodities change according to the market disequilibrium of supply and demand, while quantities change according to the stock disequilibrium and the shifting of the degree of utilization of productive capacity away from its target value. Investment by firms is modelled by a nonlinear accelerator. Non linearity in the investment function makes the equilibria of the model unstable and causes growing disproportionalities between the two sectors; business fluctuations are the outcome of the switching of the system to a different regime that allows to reduce the existing disproportionality. The different regimes into which the economy may be found are a situation of overheating and one of depression. A fundamental role in the switching of the economy is played by two crucial features of the capital good sector: its limited productive capacity and the time-lag required to increase it.

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  • G. Gozzi & F. Nardini, 2000. "A two-sector model of the business cycle: a preliminary analysis," Working Papers 382, Dipartimento Scienze Economiche, Universita' di Bologna.
    • Handle: RePEc:bol:bodewp:382
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    References listed on IDEAS

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    1. Judd, Kenneth L. & Petersen, Bruce C., 1986. "Dynamic limit pricing and internal finance," Journal of Economic Theory, Elsevier, vol. 39(2), pages 368-399, August.
    2. Luciano Boggio, 1993. "On local relative stability. With special reference to economic applications," Decisions in Economics and Finance, Springer;Associazione per la Matematica, vol. 16(1), pages 3-15, March.
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