The Role of the Assumptions for the Existence of a General Equilibrium

Pablo Ahumada

Papers from arXiv.org

Abstract: General Equilibrium Theory is the benchmark of economics, especially its results concerning the efficient allocation of resources, known as the First and Second Welfare Theorems. Yet, General Equilibrium Theory is beyond the scope of most economists. This paper is pitched as the first entry point into the theory. General Equilibrium Theory proves that at least one state of equilibrium always exists. In its most general approach, it uses fixed-point theorems to this end. This paper discusses the assumptions on individuals' behaviour and the structure of the system of exchange that guarantee that the conditions of the fixed-point theorems are satisfied. The purpose is to lay bare the role each plays in proving the existence of equilibrium and provide a clear picture of the relationship between the assumptions and the result. The discussion is presented in the simplest possible setting that captures the fundamental features of commodity exchange.

Date: 2024-11, Revised 2024-11
New Economics Papers: this item is included in nep-hpe
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