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Population dynamics and utilitarian criteria in the Lucas–Uzawa Model

Author

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  • Marsiglio, Simone
  • La Torre, Davide

Abstract

This paper introduces population growth in the Uzawa–Lucas model, analyzing the implications of the choice of the welfare criterion on the model's outcome. Traditional growth theory assumes population growth to be exponential, but this is not a realistic assumption (see Brida and Accinelli, 2007). We model exogenous population change by a generic function of population size. We show that a unique non-trivial equilibrium exists and the economy converges towards it along a saddle path, independently of population dynamics. What is affected by the type of population dynamics is the dimension of the stable manifold, which can be one or two, and when the equilibrium is reached, which can happen in finite time or asymptotically. Moreover, we show that the choice of the utilitarian criterion will be irrelevant on the equilibrium of the model, if the steady state growth rate of population is null, as in the case of logistic population growth. Then, we show that a closed-form solution for the transitional dynamics of the economy (both in the case population dynamics is deterministic and stochastic) can be found for a certain parameter restriction.

Suggested Citation

  • Marsiglio, Simone & La Torre, Davide, 2012. "Population dynamics and utilitarian criteria in the Lucas–Uzawa Model," Economic Modelling, Elsevier, vol. 29(4), pages 1197-1204.
  • Handle: RePEc:eee:ecmode:v:29:y:2012:i:4:p:1197-1204
    DOI: 10.1016/j.econmod.2012.01.016
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    References listed on IDEAS

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    Citations

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    Cited by:

    1. Alberto BUCCI & Simone MARSIGLIO, 2016. "Financial Development and Economic Growth: Long Run Equilibrium and Transitional Dynamics," Departmental Working Papers 2016-16, Department of Economics, Management and Quantitative Methods at Università degli Studi di Milano.
    2. Marsiglio, Simone, 2014. "Reassessing Edgeworth’s conjecture when population dynamics is stochastic," Journal of Macroeconomics, Elsevier, vol. 42(C), pages 130-140.
    3. Simone Marsiglio & Davide La Torre, 2012. "A note on demographic shocks in a multi-sector growth model," Economics Bulletin, AccessEcon, vol. 32(3), pages 2293-2299.
    4. repec:spr:annopr:v:251:y:2017:i:1:d:10.1007_s10479-015-1837-1 is not listed on IDEAS

    More about this item

    Keywords

    Population change; Utilitarian criteria; Uzawa–Lucas model; Transitional dynamics; Stochastic shocks; Closed-form solution;

    JEL classification:

    • O40 - Economic Development, Innovation, Technological Change, and Growth - - Economic Growth and Aggregate Productivity - - - General
    • O41 - Economic Development, Innovation, Technological Change, and Growth - - Economic Growth and Aggregate Productivity - - - One, Two, and Multisector Growth Models
    • J13 - Labor and Demographic Economics - - Demographic Economics - - - Fertility; Family Planning; Child Care; Children; Youth

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