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Endogenous versus exogenous efficiency units of labour for the quantitative study of social security: two examples

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  • Carmen Alvarez-Albelo

Abstract

This paper explores the role of endogenous versus exogenous efficiency units of labour for the quantitative evaluation of the impact of pay-as-you-go Social Security on labour supply. Pension response to a population growth rate change is also studied. Two dynamic general equilibrium models are used: one with human capital accumulation through learning-by-doing, and a second with exogenous efficiency units of labour. The main differences in the results are the following: (a) the shift in the working time-age profile induced by the elimination of Social Security considerably differs in both models. The increase in average hours worked is 4% higher under human capital accumulation than in the alternative model; and (b) the pension falls by a similar percentage in both models when the population growth rate is set to zero. This occurs because the capital-labour ratio changes less under learning-by-doing than with exogenous efficiency units of labour.

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  • Carmen Alvarez-Albelo, 2004. "Endogenous versus exogenous efficiency units of labour for the quantitative study of social security: two examples," Applied Economics Letters, Taylor & Francis Journals, vol. 11(11), pages 693-697.
    • Handle: RePEc:taf:apeclt:v:11:y:2004:i:11:p:693-697
    DOI: 10.1080/1350485042000236548
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    1. James Heckman & Lance Lochner & Christopher Taber, 1998. "Explaining Rising Wage Inequality: Explanations With A Dynamic General Equilibrium Model of Labor Earnings With Heterogeneous Agents," Review of Economic Dynamics, Elsevier for the Society for Economic Dynamics, vol. 1(1), pages 1-58, January.
    2. Susumu Imai & Michael P. Keane, 2004. "Intertemporal Labor Supply and Human Capital Accumulation," International Economic Review, Department of Economics, University of Pennsylvania and Osaka University Institute of Social and Economic Research Association, vol. 45(2), pages 601-641, May.
    3. Alan Auerbach & Laurence Kotlikoff, 2002. "Auerbach-Kotlikoff Model," QM&RBC Codes 90, Quantitative Macroeconomics & Real Business Cycles.
    4. Thomas Cooley & Jorge Soares, 1999. "Privatizing Social Security," Review of Economic Dynamics, Elsevier for the Society for Economic Dynamics, vol. 2(3), pages 731-755, July.
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