Property Rules and Defensive Conduct in Tort Law Theory
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Keith N Hylton
What role does defensive conduct play in a utilitarian theory of tort law? Why are rational (as opposed to instinctive) defensive actions permitted by tort doctrine? To address these questions I will build on the property and liability rules framework. I argue that defensive conduct plays an important role in establishing the justification for and understanding the function of property rules, such as trespass doctrine. I show that when defensive actions are taken into account, property rules are socially preferable to liability rules in low transaction cost settings, because they obviate costly defensive actions. I extend the framework to provide a positive theory of defense-related doctrines in tort law.
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