Transaction costs and a redundant security: divergence of individual and social relevance
نویسنده
چکیده
This paper shows that, in markets with transaction costs, even if a redundant security does not even save individual investors’ total costs for their security trading, the prices of the other securities may well be different were it to not be available for trade, resulting in a different equilibrium consumption allocation. In this sense, a redundant security may give rise to the divergence of individual and social relevance in markets with transaction costs. We then show that this divergence may also be a robust phenomenon with respect to perturbations in utility functions, initial endowments, and transaction costs. q 2000 Elsevier Science S.A. All rights reserved. JEL classification: D51; D52; D62; G11; G12
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