Christian At (GATE - Groupe d'analyse et de théorie économique - CNRS : UMR5824 - Université Lumière - Lyon II - Ecole Normale Supérieure Lettres et Sciences Humaines) Laurent Flochel (GATE - Groupe d'analyse et de théorie économique - CNRS : UMR5824 - Université Lumière - Lyon II - Ecole Normale Supérieure Lettres et Sciences Humaines) Patrick Roger (LARGE - Laboratoire de recherche en gestion et économie - Université Robert Schuman - Strasbourg III - Université Louis Pasteur - Strasbourg I)
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We discuss Shen and Starr(2002) results and show that the bid-ask spread of a monopolistic market-marker doesn't depend on his inventory when he posts ''martingale prices '' in an inventory model with random volumes and an unknown direction of trade.
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Paper provided by HAL in its series Post-Print with number
halshs-00178162_v1.
Length: Date of creation: Jun 2002 Date of revision: Handle: RePEc:hal:journl:halshs-00178162_v1
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