Abstract
Stewart and DeMarco’s economic theory of patient decision-making applied to the case of diabetes is flawed by clinical inaccuracies and an unrealistic depiction of patients as rational traders. The theory incorrectly represents patients’ struggles to optimize their management as calculated trade-offs against the costs of care, and gives an unrealistic, inflexible account of such costs. It imputes to physicians the view that their patients’ lack of compliance is unreasonable, but physicians are accustomed to the variety of human factors which contribute to suboptimal compliance, and work with patients to minimize their influence. By depicting patients as rational traders rather than human beings with a range of motivations and burdens, the economic theory distorts the proper function of informed consent.