The existence of equilibrium when excess demand obeys the weak axiom
This paper gives a nonfixed point theoretic proof of equilibrium existence when the excess demand function of an exchange economy obeys the weak axiom. The proof is simple and geometrically intuitive, and it also permits a weakening of the continuity assumption on the excess demand function. (This paper is a more developed and (one hopes) improved version of an earlier working paper entitled An Elementary Equilibrium Existence Theorem, Working Paper W6 (2000), Nuffield College, Oxford.)
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Date of creation:  01 Feb 2004 
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Handle:  RePEc:oxf:wpaper:2004w07 
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 John Quah, 1999.
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 Nachbar, John H., 2004. "General equilibrium comparative statics: discrete shocks in production economies," Journal of Mathematical Economics, Elsevier, vol. 40(12), pages 153163, February.
 Quah, John K. H., 2003. "Market demand and comparative statics when goods are normal," Journal of Mathematical Economics, Elsevier, vol. 39(34), pages 317333, June.
 Reinhard John, 1999. "Abraham Wald's equilibrium existence proof reconsidered," Economic Theory, Springer;Society for the Advancement of Economic Theory (SAET), vol. 13(2), pages 417428.
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 JeanMichel Grandmont, 1991. "Transformations of the Commodity Space, Behavioral Heterogeneity and the Aggregation Problem," Cowles Foundation Discussion Papers 987, Cowles Foundation for Research in Economics, Yale University.
 John H. Nachbar, 2002. "General Equilibrium Comparative Statics," Econometrica, Econometric Society, vol. 70(5), pages 20652074, September.
 John K.H. Quah, 1997. "The Law of Demand when Income Is Price Dependent," Econometrica, Econometric Society, vol. 65(6), pages 14211442, November.
 Rosa Barbolla & Luis C. Corchón, 1989. "An Elementary Proof of the Existence of a Competitive Equilibrium in a Special Case," The Quarterly Journal of Economics, Oxford University Press, vol. 104(2), pages 385389.
 Michael Jerison & John K.H. Quah, 2006. "Law of Demand," Discussion Papers 0607, University at Albany, SUNY, Department of Economics.
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