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Multiple Equilibria in a Growth Model with Monopolistic Competition

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  • Galí, Jordi

Abstract

We develop a simple growth model with imperfect competition in which demand conditions can affect the dynamics of capital accumulation, hindering or enhancing growth. In our model the elasticity of the demand schedule faced by a typical firm depends on the aggregate savings rate. The latter feature results from a wedge between the elasticity of substitution across inputs in productive activities and the elasticity of substitution across goods in consumption. When the demand elasticity is constant or inversely related to the savings rate the equilibrium dynamics are shown to be qualitatively identical to those found in the perfectly competitive one-sector growth model: there is a unique stationary equilibrium which is saddle-point stable. In contrast, when the demand elasticity is positively related to the savings rate, multiple stationary equilibria (as well as multiple non-stationary equilibrium paths converging to them) emerge for some parameter values. In the latter case, the model can account for permanent differences in per capita income across homogeneous economies (even when the initial conditions are identical), as well as the absence of capital flows from rich to poor countries.

Suggested Citation

  • Galí, Jordi, 1993. "Multiple Equilibria in a Growth Model with Monopolistic Competition," CEPR Discussion Papers 751, C.E.P.R. Discussion Papers.
    • Handle: RePEc:cpr:ceprdp:751
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    Cited by:

    1. Bernardo Guimaraes & Caio Machado & Marcel Ribeiro, 2016. "A Model of the Confidence Channel of Fiscal Policy," Journal of Money, Credit and Banking, Blackwell Publishing, vol. 48(7), pages 1363-1395, October.
    2. Kuhry, Yves, 2001. "Endogenous fluctuations in a cournotian monopolistic competition model with free entry and market power variability," Research in Economics, Elsevier, vol. 55(4), pages 389-412, December.
    3. Park, Hyun, 2020. "Indeterminate equilibrium growth with product and R&D spillovers," Economic Modelling, Elsevier, vol. 86(C), pages 286-298.
    4. Yakita, Akira, 2004. "Elasticity of substitution in public capital formation and economic growth," Journal of Macroeconomics, Elsevier, vol. 26(3), pages 391-408, September.
    5. Fagnart, Jean-Francois & Pierrard, O. & Sneessens, Henri R., 2007. "Microeconomic uncertainty and macroeconomic indeterminacy," European Economic Review, Elsevier, vol. 51(6), pages 1564-1588, August.
    6. Charles-Henri DiMaria, 2014. "Sustainability matters," Quality & Quantity: International Journal of Methodology, Springer, vol. 48(3), pages 1257-1269, May.
    7. Raurich, Xavier & Sala, Hector & Sorolla, Valeri, 2012. "Factor shares, the price markup, and the elasticity of substitution between capital and labor," Journal of Macroeconomics, Elsevier, vol. 34(1), pages 181-198.
    8. Horvath, Michael, 2000. "Sectoral shocks and aggregate fluctuations," Journal of Monetary Economics, Elsevier, vol. 45(1), pages 69-106, February.
    9. Wang, Peng-fei & Wen, Yi, 2011. "Volatility, growth, and welfare," Journal of Economic Dynamics and Control, Elsevier, vol. 35(10), pages 1696-1709, October.
    10. Kitagawa, Akiomi & Shibata, Akihisa, 2001. "Long gestation in an overlapping generations economy: endogenous cycles and indeterminacy of equilibria," Journal of Mathematical Economics, Elsevier, vol. 35(1), pages 99-127, February.
    11. Olivier SCAILLET, 2001. "Density Estimation Using Inverse and Reciprocal Inverse Guassian Kernels," LIDAM Discussion Papers IRES 2001017, Université catholique de Louvain, Institut de Recherches Economiques et Sociales (IRES).
    12. Marco Riguzzi & Philipp Wegmueller, 2017. "Economic Openness and Fiscal Multipliers," International Economic Journal, Taylor & Francis Journals, vol. 31(1), pages 1-35, January.
    13. Benhabib, Jess & Dong, Feng & Wang, Pengfei, 2018. "Adverse selection and self-fulfilling business cycles," Journal of Monetary Economics, Elsevier, vol. 94(C), pages 114-130.
    14. Wang, Pengfei & Wen, Yi, 2008. "Imperfect competition and indeterminacy of aggregate output," Journal of Economic Theory, Elsevier, vol. 143(1), pages 519-540, November.
    15. José Ramón García & Valeri Sorolla, 2014. "Monopolistic Competition and Different Wage Setting Systems," Scottish Journal of Political Economy, Scottish Economic Society, vol. 61(1), pages 48-77, February.
    16. Pedro Gomis-Porqueras & Solmaz Moslehi & Vivianne Vilar, 2013. "The Fiscal Theory of the Price Level When All Income is Taxed," Monash Economics Working Papers 09-13, Monash University, Department of Economics.
    17. Jorgen Jacobsen, Hans, 2000. "Endogenous, imperfectly competitive business cycles," European Economic Review, Elsevier, vol. 44(2), pages 305-336, February.
    18. Tse, C.Y.Chung Yi, 2004. "Search frictions, market power, and long-run growth," Journal of Economic Theory, Elsevier, vol. 116(2), pages 323-346, June.
    19. Velasco, Andres, 1996. "Animal spirits, investment and international capital movements," Journal of International Money and Finance, Elsevier, vol. 15(2), pages 221-237, April.
    20. R. Cellini & L. Lambertini & I. P. Ottaviano, 1999. "Growth in a Differentiated Oligopoly with Product Innovation," Working Papers 363, Dipartimento Scienze Economiche, Universita' di Bologna.
    21. Sinha, Deepak K., 2007. "Market clearing with some neo-Keynesian features," Journal of Macroeconomics, Elsevier, vol. 29(1), pages 206-225, March.
    22. Greg Kaplan & Guido Menzio, 2016. "Shopping Externalities and Self-Fulfilling Unemployment Fluctuations," Journal of Political Economy, University of Chicago Press, vol. 124(3), pages 771-825.
    23. Costas Azariadis & James B. Bullard & Lee E. Ohanian, 1998. "Complex eigenvalues and trend-reverting fluctuations," Staff Report 255, Federal Reserve Bank of Minneapolis.
    24. Xavier Raurich & Valeri Sorolla, 2008. "A General Framework for Growth Models with Non-Competitive Labor and Product Markets and Disequilibrium Unemployment," Working Papers 369, Barcelona School of Economics.

    More about this item

    Keywords

    Cross-country Income Differences; Growth; Imperfect Competition; Multiple Equilibria; Savings Rate;
    All these keywords.

    JEL classification:

    • E21 - Macroeconomics and Monetary Economics - - Consumption, Saving, Production, Employment, and Investment - - - Consumption; Saving; Wealth
    • E22 - Macroeconomics and Monetary Economics - - Consumption, Saving, Production, Employment, and Investment - - - Investment; Capital; Intangible Capital; Capacity
    • E23 - Macroeconomics and Monetary Economics - - Consumption, Saving, Production, Employment, and Investment - - - Production
    • L13 - Industrial Organization - - Market Structure, Firm Strategy, and Market Performance - - - Oligopoly and Other Imperfect Markets
    • L16 - Industrial Organization - - Market Structure, Firm Strategy, and Market Performance - - - Industrial Organization and Macroeconomics; Macroeconomic Industrial Structure
    • O41 - Economic Development, Innovation, Technological Change, and Growth - - Economic Growth and Aggregate Productivity - - - One, Two, and Multisector Growth Models

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