Strategic complementarities and search market equilibrium

Michael Rauh ()

Games and Economic Behavior, 2009, vol. 66, issue 2, 959-978

Abstract: In this paper, we apply supermodular game theory to the equilibrium search literature with sequential search. We identify necessary and sufficient conditions for the pricing game to exhibit strategic complementarities and prove existence of equilibrium. We then show that price dispersion is inherently incompatible with strategic complementarities in the sense that the Diamond Paradox obtains when firms are identical and is robust within the class of search cost densities that are small near zero and support strategic complementarities. We also show that a major criticism of the literature, that agents act as if they know the distribution of prices, can be justified in the sense of convergent best response dynamics.

Keywords: Diamond; Paradox; Price; dispersion; Search; Strategic; complementarities (search for similar items in EconPapers)
Date: 2009
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Citations: View citations in EconPapers (4)

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Related works:
Working Paper: Strategic Complementarities and Search Market Equilibrium (2006)
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Persistent link: https://EconPapers.repec.org/RePEc:eee:gamebe:v:66:y:2009:i:2:p:959-978

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