Substitute goods, auctions, and equilibrium

Paul Milgrom and Bruno Strulovici

Journal of Economic Theory, 2009, vol. 144, issue 1, 212-247

Abstract: This paper identifies two notions of substitutes for auction and equilibrium analysis. Weak substitutes, the usual price-theory notion, guarantees monotonicity of Tatonnement processes and convergence of clock auctions to a pseudo-equilibrium, but only strong substitutes, which treats each unit traded as a distinct good with its own price, guarantees that every pseudo-equilibrium is a Walrasian equilibrium, that the Vickrey outcome is in the core, and that the "law of aggregate demand" is satisfied. When goods are divisible, weak substitutes along with concavity guarantees all of the above properties, except for the law of aggregate demand.

Keywords: Gross; substitutes; Tatonnement; Pseudo-equilibrium; Law; of; aggregate; demand (search for similar items in EconPapers)
Date: 2009
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Citations: View citations in EconPapers (32)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:jetheo:v:144:y:2009:i:1:p:212-247

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