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Title: On Competitive Nonlinear Pricing

Author(s): Andrea Attar, Thomas Mariotti and François Salanié

Publication Date: September 2015

Keyword(s): adverse selection, competing mechanisms and limit-order book

Programme Area(s): Financial Economics

Abstract: Many financial markets rely on a discriminatory limit-order book to balance supply and demand. We study these markets in a static model in which uninformed market makers compete in nonlinear tariffs to trade with an informed insider, as in Glosten (1994), Biais, Martimort, and Rochet (2000), and Back and Baruch (2013). We analyze the case where tariffs are unconstrained and the case where tariffs are restricted to be convex. In both cases, we show that pure-strategy equilibrium tariffs must be linear and, moreover, that such equilibria only exist under exceptional circumstances. These results cast doubt on the stability of even well-organized financial markets.

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Bibliographic Reference

Attar, A, Mariotti, T and Salanié, F. 2015. 'On Competitive Nonlinear Pricing'. London, Centre for Economic Policy Research. https://cepr.org/active/publications/discussion_papers/dp.php?dpno=10850