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Least Common Avoidance: The Tragedy of Common Safety

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Type: Working Paper
Author: Dari-Mattiacci, Giuseppe; Garoupa, Nuno
Date: 2009
Series: George Mason University Law and Economics Research Paper Series, no. 04-27
URI: http://hdl.handle.net/10535/6330
Sector: Theory
Subject(s): cost
game theory
Abstract: "This paper shows that the least cost avoider approach in tort is not necessarily the optimal way to attain least cost avoidance when accidents can be avoided by either of two parties. When parties do not observe each other's costs of care at the time of the accident and are unable to determine which party is the least cost avoider, they fail to anticipate the outcome of the adjudication. Under these circumstances, accident avoidance becomes a commons problem because care by each individual party reduces the prospect of liability for both parties. As a result parties suboptimally invest in care. We show that regulation removes this problem and is superior to tort liability both when parties act simultaneously and when they act sequentially. We further examine how different liability rules perform in this respect."

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