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About the second theorem of welfare economics with stock markets

Abstract : This paper discusses necessary optimality conditions for multi-objective optimization problems with application to the Second Theorem of Welfare Economics. We use the extremal principle, since we consider non-convex sets non-smooth functions. Particularly, we develop a slight generalization of the main result of A. Jofré and J. Rivera Cayupi [A nonconvex separation property and some applications, Math. Program. 108 (2006) 37-51], which allows more flexibility in a stochastic economy with production and stock market. Formally, we define a stock market equilibrium through the necessary optimality conditions at a constrained Pareto optimal allocation. We show that the Second Theorem of Welfare Economics holds in a two-period framework. But, by mean of an example, we show that this later result is no longer true for multi-period economies.
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Submitted on : Wednesday, December 6, 2006 - 3:38:07 PM
Last modification on : Tuesday, January 19, 2021 - 11:08:27 AM
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  • HAL Id : halshs-00118822, version 1



Jean-Marc Bonnisseau, Oussama Lachiri. About the second theorem of welfare economics with stock markets. 2006. ⟨halshs-00118822⟩



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