Price Dispersion: Theoretical Considerations and Empirical Evidence from the Marseilles Fish Market

Alan Kirman () and Annick Vignes ()
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Alan Kirman: EHESS - École des hautes études en sciences sociales
Annick Vignes: CAMS - Centre d'Analyse et de Mathématique sociales - EHESS - École des hautes études en sciences sociales - CNRS - Centre National de la Recherche Scientifique, LISIS - Laboratoire Interdisciplinaire Sciences, Innovations, Sociétés - CNRS - Centre National de la Recherche Scientifique - INRAE - Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement - Université Gustave Eiffel

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Abstract: It is an obvious and well-documented fact that identical units of goods are on sale at different prices in the same geographical region to the same consumers.1 Strictly speaking Diamond's observation that ‘In Walrasian theory all purchases of a homogeneous good occur at the same price' (Diamond, 1987) is not contradicted by this fact since no two transactions take place at precisely the same time and place and thus any two units of good sold in different transactions cannot really be regarded as units of a homogeneous good. Nevertheless the typical more intuitive explanation given is that a situation in which identical units of a good were sold at similar times in the same market for significantly different prices could not be sustained. In fact one could try to make this argument precise by using a continuity argument where the only parameters differentiating goods were time and space. In this case the argument would be that prices of units of a good with the same physical characteristics available at about the same place and time are similar.

Keywords: nomads; loyalty; Mixed strategies; Prices discrimination (search for similar items in EconPapers)
Date: 1991
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Published in Kenneth Arrow eds. Issues in Contemporary Economics, Palgrave Macmillan UK, pp.160-185, 1991, 978-1-349-11575-4. ⟨10.1007/978-1-349-11573-0_11⟩

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Persistent link: https://EconPapers.repec.org/RePEc:hal:journl:hal-05494203

DOI: 10.1007/978-1-349-11573-0_11

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