 Critiques fall roughly into two groups. The first accepts the instrumentalism of law, at one level or another. It rejects, however, either efficiency as the aim of the designer or the assumption of rationality underlying any behavioral claim that may be implicated in a rationalization of doctrine. Issues related to the efficiency criterion are discussed below in section 6. The rejection of economic rationality generally rests on its failure to accommodate normativity, an issue we discuss in section 4.