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General existence of competitive equilibrium in the growth model with an endogenous labor-leisure choice

Aditya Goenka () and Manh Hung Nguyen ()

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Abstract: We prove the existence of competitive equilibrium in the canonical optimal growth model with elastic labor supply under general conditions. In this model, strong conditions to rule out corner solutions are often not well justied. We show using a separation argument that there exist Lagrange multipliers that can be viewed as a system of competitive prices. Neither Inada conditions, nor strict concavity, nor homogeneity, nor dierentiability are required for existence of a competitive equilibrium. Thus, we cover important specications used in the macroeconomics literature for which existence of a competitive equilibrium is not well understood. We give examples to illustrate the violation of the conditions used in earlier existence results but where a competitive equilibrium can be shown to exist following the approach in this paper.

Keywords: Optimal growth; Competitive equilibrium; Lagrange multipliers; Elastic la-; Bor supply; Inada conditions. (search for similar items in EconPapers)
Date: 2020-12
New Economics Papers: this item is included in nep-gro
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Published in Journal of Mathematical Economics, Elsevier, 2020, 91, pp.90-98. ⟨10.1016/j.jmateco.2020.08.004⟩

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DOI: 10.1016/j.jmateco.2020.08.004

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