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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.

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Bibliographic Info

Paper provided by C.E.P.R. Discussion Papers in its series CEPR Discussion Papers with number 751.

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Date of creation: Jan 1993
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Handle: RePEc:cpr:ceprdp:751

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Keywords: Cross-country Income Differences; Growth; Imperfect Competition; Multiple Equilibria; Savings Rate;

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Cited by:
  1. Jorgen Jacobsen, Hans, 2000. "Endogenous, imperfectly competitive business cycles," European Economic Review, Elsevier, vol. 44(2), pages 305-336, February.
  2. Costas Azariadis & James Bullard & Lee E. Ohanian, 1998. "Complex eigenvalues and trend-reverting fluctuations," Staff Report 255, Federal Reserve Bank of Minneapolis.
  3. 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.
  4. 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.
  5. Horvath, Michael, 2000. "Sectoral shocks and aggregate fluctuations," Journal of Monetary Economics, Elsevier, vol. 45(1), pages 69-106, February.
  6. 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.
  7. 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.
  8. Charles-Henri Dimaria, 2013. "Sustainability matters," Post-Print halshs-00827315, HAL.
  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. Wang, Pengfei & Wen, Yi, 2008. "Imperfect competition and indeterminacy of aggregate output," Journal of Economic Theory, Elsevier, vol. 143(1), pages 519-540, November.
  11. Olivier SCAILLET, 2001. "Density Estimation Using Inverse and Reciprocal Inverse Guassian Kernels," Discussion Papers (IRES - Institut de Recherches Economiques et Sociales) 2001017, Université catholique de Louvain, Institut de Recherches Economiques et Sociales (IRES).
  12. Velasco, Andres, 1996. "Animal spirits, investment and international capital movements," Journal of International Money and Finance, Elsevier, vol. 15(2), pages 221-237, April.
  13. Xavier Raurich & Hector Sala & Valeri Sorolla, 2011. "Factor shares, the price markup, and the elasticity of substitution between capital and labor," Working Papers wpdea1109, Department of Applied Economics at Universitat Autonoma of Barcelona.
  14. Yakita, Akira, 2004. "Elasticity of substitution in public capital formation and economic growth," Journal of Macroeconomics, Elsevier, vol. 26(3), pages 391-408, September.
  15. 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.
  16. 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 Graduate School of Economics.
  17. Sinha, Deepak K., 2007. "Market clearing with some neo-Keynesian features," Journal of Macroeconomics, Elsevier, vol. 29(1), pages 206-225, March.

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  1. Quantitative Macroeconomics and Real Business Cycles (QM&RBC)

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