 To complete an economic account of the authority of law requires that one explain why the agent should consider legal rules as the relevant rules to which she should defer. One might argue that those who promulgate legal rules have special expertise that makes it likely that they will enact rules that are better than the rules that the agent herself would formulate. For some legal rules—technical rules concerning health and safety promulgated by administrative agencies—the argument may have merit. After all the decision at issue depends on a mass of technical data that is not easily assimilable or manipulable. For many other legal rules promulgated by legislatures and courts, however, the argument may not apply.