Private Information, Self-Serving Biases, and Optimal Settlement Mechanisms

Theory and Evidence

Published in: USC Law School Olin Research Paper, no. 03-8, Apr. 2003, p. 1-31

Posted on RAND.org on January 01, 2003

by Seth A. Seabury, Eric Talley

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The law and economics literature on suit and settlement has tended to focus on two alternative conceptual models. On the one hand, the optimism model of pre-trial negotiation attempts to explain settlement failure as an artifact of unfounded optimism by one or both parties. The idea that bargaining agents can adopt such non-rational biases receives support from experimental evidence. On the other hand, the private information model of pre-trial bargaining portrays settlement failures as an artifact of strategic information rent extraction. It finds support in some experimental evidence as well. This paper presents (for the first time) a mechanism-design approach for studying suit and settlement in the presence of both optimism and two-sided private information. The authors use a parameterization of our framework to generate testable comparative statistics that distinguish between the two competing models, and then test these predictions using data from civil jury trials before and after the limitation on non-economic medical malpractice damages introduced by California legislation during the 1970s. Our (preliminary) results appear to be most consistent with the optimism model rather than the information model.

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