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Uniqueness and Multiple Trajectories for the Case of Lucas Model

Author

Listed:
  • C. Chilarescu

    () (Université de Lille 1)

  • I. Viasu

    (West University of Timisoara)

Abstract

Abstract The main aim of this paper is to prove that the model introduced by Lucas and further analyzed by Caballe and Santos, Mulligand and Sala-I-Martin, Benhabib and Perli and finally by Boucekkine and Ruiz-Tamarit, has two interesting properties. If the externality parameter in the production of human capital is greater than the elasticity of output with respect to physical capital, then the system is characterized by multiple transitional paths, indexed by the starting value of the fraction of labor allocated to the production of physical capital, leading to different steady-states equilibrium. Alternatively, if the externality parameter in the production of human capital is smaller than the elasticity of output with respect to physical capital, then the system is characterized by an unique transitional path, convergent to the unique steady-state equilibrium. For the special case where the inverse of the elasticity of intertemporal substitution equals the elasticity of output with respect to physical capital, we obtain closed-form solutions and thus, our approach contains as particular cases some other results, as those obtained by Boucekkine and Ruiz-Tamarit. More than this, differently to Boucekkine and Ruiz-Tamarit we obtain closed-form solutions for all variables of the model and thus we are able to verify the two transitional conditions.

Suggested Citation

  • C. Chilarescu & I. Viasu, 2019. "Uniqueness and Multiple Trajectories for the Case of Lucas Model," Computational Economics, Springer;Society for Computational Economics, vol. 54(3), pages 1157-1177, October.
  • Handle: RePEc:kap:compec:v:54:y:2019:i:3:d:10.1007_s10614-018-9867-9
    DOI: 10.1007/s10614-018-9867-9
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    References listed on IDEAS

    as
    1. Boucekkine Raouf & Ruiz Tamarit Ramon, 2004. "Imbalance Effects in the Lucas Model: an Analytical Exploration," The B.E. Journal of Macroeconomics, De Gruyter, vol. 4(1), pages 1-19, December.
    2. Benhabib Jess & Perli Roberto, 1994. "Uniqueness and Indeterminacy: On the Dynamics of Endogenous Growth," Journal of Economic Theory, Elsevier, vol. 63(1), pages 113-142, June.
    3. Hiraguchi, Ryoji, 2009. "A note on the closed-form solution to the Lucas-Uzawa model with externality," Journal of Economic Dynamics and Control, Elsevier, vol. 33(10), pages 1757-1760, October.
    4. Chilarescu, Constantin, 2011. "On the existence and uniqueness of solution to the Lucas–Uzawa model," Economic Modelling, Elsevier, vol. 28(1), pages 109-117.
    5. Casey B. Mulligan & Xavier Sala-i-Martin, 1993. "Transitional Dynamics in Two-Sector Models of Endogenous Growth," The Quarterly Journal of Economics, Oxford University Press, vol. 108(3), pages 739-773.
    6. Robert J. Barro & Xavier Sala-i-Martin, 2003. "Economic Growth, 2nd Edition," MIT Press Books, The MIT Press, edition 2, volume 1, number 0262025531.
    7. Constantin Chilarescu & Ioana Viasu, 2016. "A closed-form solution of a two-sector endogenous growth model with habit formation," Post-Print hal-02397386, HAL.
    8. Ruiz-Tamarit, José Ramón, 2008. "The closed-form solution for a family of four-dimension nonlinear MHDS," Journal of Economic Dynamics and Control, Elsevier, vol. 32(3), pages 1000-1014, March.
    9. Caballe, Jordi & Santos, Manuel S, 1993. "On Endogenous Growth with Physical and Human Capital," Journal of Political Economy, University of Chicago Press, vol. 101(6), pages 1042-1067, December.
    10. Chilarescu, Constantin, 2011. "On the existence and uniqueness of solution to the Lucas-Uzawa model," Economic Modelling, Elsevier, vol. 28(1-2), pages 109-117, January.
    11. Boucekkine, R. & Ruiz-Tamarit, J.R., 2008. "Special functions for the study of economic dynamics: The case of the Lucas-Uzawa model," Journal of Mathematical Economics, Elsevier, vol. 44(1), pages 33-54, January.
    12. Constantin Chilarescu & Ioana Viasu, 2016. "A Closed-form Solution of a Two-sector Endogenous Growth Model with Habit Formation," Australian Economic Papers, Wiley Blackwell, vol. 55(2), pages 112-127, June.
    13. Hiraguchi, Ryoji, 2009. "A solution to the Lucas-Uzawa model with increasing returns to scale: Note," Economic Modelling, Elsevier, vol. 26(5), pages 831-834, September.
    14. Lucas, Robert Jr., 1988. "On the mechanics of economic development," Journal of Monetary Economics, Elsevier, vol. 22(1), pages 3-42, July.
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    More about this item

    Keywords

    Endogenous growth model; Indeterminacy; Unique solution; Hamiltonian function;

    JEL classification:

    • C61 - Mathematical and Quantitative Methods - - Mathematical Methods; Programming Models; Mathematical and Simulation Modeling - - - Optimization Techniques; Programming Models; Dynamic Analysis
    • C62 - Mathematical and Quantitative Methods - - Mathematical Methods; Programming Models; Mathematical and Simulation Modeling - - - Existence and Stability Conditions of Equilibrium
    • O41 - Economic Development, Innovation, Technological Change, and Growth - - Economic Growth and Aggregate Productivity - - - One, Two, and Multisector Growth Models

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