 In addition to threats and exploitative offers, agents may be subject to influences in the bargaining process that impair their ability to decide rationally or based on their considered and robust desires (on conceptions of freedom that identify some but not all of the agent’s desires with her will, see, e.g., Frankfurt 1973 [1988], Yaffe 2007). A seller might take advantage of a buyer’s innumeracy or cognitive biases in eliciting her consent. While the law recognizes a category of “undue influence” as grounds for recission, the doctrine’s application, in addition to being undertheorized, is usually limited to cases involving a special relationship of trust. It is widely acknowledged, however, that rationality failures can be exploited within exchange relationships, and the potential for exploitation is often the basis for regulatory intervention. A comprehensive analysis of freedom in contract should therefore clarify what forms of persuasion count as instances of wrongful control, a question that accounts of duress and uninformed consent do not necessarily address.