Abstract There are two ways that the negligence rule is interpreted. Under one interpretation a negligent injurer is liable for the entire harm to the victim; and under the other interpretation a negligent injurer is liable only for that part of the harm which can be ascribed to his negligence....

This paper investigates the structure of incremental liability rules. Necessary and sufficient conditions are derived for an incremental liability rule to be efficient. A liability rule, in the ordinary sense of the term, to be called a standard liability rule, is a rule which specifies the...