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Existence of competitive equilibrium in an optimal growth model with elastic labor supply and smoothness of the policy function

  • GOENKA Aditya
  • NGUYEN Manh-Hung

We prove the existence of competitive equilibrium and the moothness of policy function in an optimal growth model with elastic labor supply by using a simple method. Our approach is based on the result of existence of Lagrange multipliers and their representation as a summable sequence due to Le Van and Saglam [2004] to define the sequence of prices and wages. The proof of existence of equilibrium we give is more simple than in Le Van and Vailakis [2004] and requires less stringent assumptions (neither Inada conditions for the utility function and the production function nor constant return to scale for the production function nor strict concavity). We also prove the differentiability of the policy function at a stationary optimal stock where the derivative of the policy function equals the smaller characteristic root in absolute value associated with Euler equation. Conditions for differentiability of the policy function have so far been assumed in the literature.

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Paper provided by LERNA, University of Toulouse in its series LERNA Working Papers with number 09.21.297.

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Date of creation: Jul 2009
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Handle: RePEc:ler:wpaper:09.21.297
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  1. LE VAN, Cuong & SAGLAM, Cagri, 2003. "Optimal growth models and the Lagrange multiplier," CORE Discussion Papers 2003083, Université catholique de Louvain, Center for Operations Research and Econometrics (CORE).
  2. Cuong Le Van & Manh-Hung Nguyen & Yiannis Vailakis, 2007. "Equilibrium dynamics in an aggregative model of capital accumulation with heterogeneous agents and elastic labor," Université Paris1 Panthéon-Sorbonne (Post-Print and Working Papers) halshs-00101237, HAL.
  3. LE VAN, Cuong & VAILAKIS, Yiannis, . "Existence of a competitive equilibrium in a one sector growth model with heterogeneous agents and irreversible investment," CORE Discussion Papers RP -1762, Université catholique de Louvain, Center for Operations Research and Econometrics (CORE).
  4. S. Rao Aiyagari & Lawrence J. Christiano & Martin Eichenbaum, 1990. "The Output, Employment, and Interest Rate Effects of Government Consumption," NBER Working Papers 3330, National Bureau of Economic Research, Inc.
  5. Cuong Le Van & Manh-Hung Nguyen & Yiannis Vailakis, 2005. "Equilibrium dynamics in an aggregative model of capital accumulation with heterogeneous agents and elastic labor," Université Paris1 Panthéon-Sorbonne (Post-Print and Working Papers) halshs-00197560, HAL.
  6. Jeremy Greenwood & Gregory W. Huffman, 1993. "On the existence of nonoptimal equilibria in dynamic stochastic economies," Research Paper 9330, Federal Reserve Bank of Dallas.
  7. Bewley, Truman F., 1972. "Existence of equilibria in economies with infinitely many commodities," Journal of Economic Theory, Elsevier, vol. 4(3), pages 514-540, June.
  8. Dana Rose-anne & Le Van Cuong, 1987. "Optimal growth and pareto-optimality," CEPREMAP Working Papers (Couverture Orange) 8723, CEPREMAP.
  9. Mitra, Tapan & Nishimura, Kazuo, 2002. "Intertemporal Complementarity and Optimality: A Study of a Two-Dimensional Dynamical System," Working Papers 02-06, Cornell University, Center for Analytic Economics.
  10. Majumdar, Mukul, 1972. "Some general theorems on efficiency prices with an infinite-dimensional commodity space," Journal of Economic Theory, Elsevier, vol. 5(1), pages 1-13, August.
  11. Cuong Le Van & Yiannis Vailakis, 2004. "Existence of competitive equilibrium in a single-sector growth model with elastic labour," Cahiers de la Maison des Sciences Economiques b04123, Université Panthéon-Sorbonne (Paris 1).
  12. Datta, Manjira & Mirman, Leonard J. & Reffett, Kevin L., 2002. "Existence and Uniqueness of Equilibrium in Distorted Dynamic Economies with Capital and Labor," Journal of Economic Theory, Elsevier, vol. 103(2), pages 377-410, April.
  13. Kazuo Nishimura & Makoto Yano, 2006. "Introduction," The Japanese Economic Review, Japanese Economic Association, vol. 57(4), pages 455-456.
  14. Santos, Manuel S, 1991. "Smoothness of the Policy Function in Discrete Time Economic Models," Econometrica, Econometric Society, vol. 59(5), pages 1365-82, September.
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