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From Sunspots to Black Holes: Singular Dynamics in Macroeconomic Models

In: Sunspots and Non-Linear Dynamics

Author

Listed:
  • Paulo B. Brito

    (Universidade de Lisboa
    UECE - Research Unit on Complexity and Economics, ISEG)

  • Luís F. Costa

    (Universidade de Lisboa
    UECE - Research Unit on Complexity and Economics, ISEG)

  • Huw D. Dixon

    (Cardiff University)

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.

Suggested Citation

  • Paulo B. Brito & Luís F. Costa & Huw D. Dixon, 2017. "From Sunspots to Black Holes: Singular Dynamics in Macroeconomic Models," Studies in Economic Theory, in: Kazuo Nishimura & Alain Venditti & Nicholas C. Yannelis (ed.), Sunspots and Non-Linear Dynamics, chapter 0, pages 41-70, Springer.
    • Handle: RePEc:spr:steccp:978-3-319-44076-7_3
    DOI: 10.1007/978-3-319-44076-7_3
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    References listed on IDEAS

    as
    1. Barnett, William A. & He, Susan, 2010. "Existence of singularity bifurcation in an Euler-equations model of the United States economy: Grandmont was right," Economic Modelling, Elsevier, vol. 27(6), pages 1345-1354, November.
    2. Cass, David & Shell, Karl, 1983. "Do Sunspots Matter?," Journal of Political Economy, University of Chicago Press, vol. 91(2), pages 193-227, April.
    3. Joseph E. Stiglitz, 2011. "Rethinking Macroeconomics: What Failed, And How To Repair It," Journal of the European Economic Association, European Economic Association, vol. 9(4), pages 591-645, August.
    4. Grandmont, Jean-Michel & Pintus, Patrick & de Vilder, Robin, 1998. "Capital-Labor Substitution and Competitive Nonlinear Endogenous Business Cycles," Journal of Economic Theory, Elsevier, vol. 80(1), pages 14-59, May.
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    Cited by:

    1. Zhiming Fu & Antoine Le Riche, 2022. "Public spending, monetary policy and macroeconomic instability," Journal of Public Economic Theory, Association for Public Economic Theory, vol. 24(3), pages 580-608, June.
    2. Abad, Nicolas & Lloyd-Braga, Teresa & Modesto, Leonor, 2020. "The failure of stabilization policy: Balanced-budget fiscal rules in the presence of incompressible public expenditures," Journal of Economic Dynamics and Control, Elsevier, vol. 120(C).
    3. Anton Bondarev, 2021. "Games Without Winners: Catching-up with Asymmetric Spillovers," Dynamic Games and Applications, Springer, vol. 11(4), pages 670-703, December.
    4. Paulo Brito, 2017. "Government Debt, Fiscal Rules and Singular Growth Dynamics," Dynamic Modeling and Econometrics in Economics and Finance, in: Bettina Bökemeier & Alfred Greiner (ed.), Inequality and Finance in Macrodynamics, pages 43-74, Springer.

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    More about this item

    Keywords

    Slow-fast singularities; Impasse singularities; Macroeconomic dynamics; Temporary indeterminacy;
    All these keywords.

    JEL classification:

    • C62 - Mathematical and Quantitative Methods - - Mathematical Methods; Programming Models; Mathematical and Simulation Modeling - - - Existence and Stability Conditions of Equilibrium
    • D43 - Microeconomics - - Market Structure, Pricing, and Design - - - Oligopoly and Other Forms of Market Imperfection
    • E32 - Macroeconomics and Monetary Economics - - Prices, Business Fluctuations, and Cycles - - - Business Fluctuations; Cycles

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