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In an agency relationship, one party acts on behalf of another. It is curious that a concept that could not be more profoundly sociological does not have a niche in the sociological literature. This essay begins with the economics paradigm of agency theory, which casts a very long shadow over the social sciences, and then traces how these ideas diffuse to and are transformed (if at all) in the scholarship produced in business schools, political science, law, and sociology. I cut a swathe through the social fabric where agency relationships are especially prevalent and examine some of the institutions, roles, forms of social organization, deviance, and strategies of social control that deliver agency and respond to its vulnerabilities, and I consider their impact. Finally, I suggest how sociology might make better use of and contribute to agency theory.

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Research has shown that learning disabled (LD) children are likely to develop a maladaptive pattern of causal attributions. However, it is unclear whether LD children are more likely to differ from their peers in terms of a greater tendency to attribute their difficulties to insufficient ability or in terms of a greater tendency to blame external factors. The present study found that LD girls were significantly more likely than nondisabled girls to attribute their difficulties to insufficient ability, but they did not differ in their tendency to attribute their difficulties to external factors. In contrast, LD boys were significantly more likely than nondisabled boys to attribute their difficulties to external factors, but they did not differ from nondisabled boys in their tendency to attribute their difficulties to insufficient ability. The present study also examined the differential implications of these two attributional tendencies. Although the tendency to blame one's ability was negatively related to persistence on a reading task administered by a novel adult, the tendency to attribute one's difficulties to external factors did not show this negative relation.

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Resolution of long-standing debates about the role and impact of advance directives - living wills and powers of attorney for health care - has been hampered by a dearth of appropriate data, in particular data that compare the process and outcomes of end-of-life decision making on behalf of patients with and without advance directives. Drawing on a large ethnographic study of patients in two intensive care units in a large urban teaching hospital, this article compares aspects of the medical decision-making process and outcomes by advance-directive status. Controlling for demographic characteristics and severity of illness, the study finds few significant differences between patients without advance directives and those who claim to have them. Surprisingly, these few differences hold only for those whose directives are in their hospital chart. There are no significant differences between those with no directive and those claiming to have a copy at home or elsewhere. The article considers the implications if directives seemingly must be in hand to show even modest effects. Do advance directives direct? The intensive care unit data provide far more support for the growing body of literature that casts doubt on their impact than studies that promote the use of them.

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The privileging of the substituted judgment standard as the gold standard for surrogate decision making in law and bioethics has constrained the research agenda in end-of-life decision making. The empirical literature is inundated with a plethora of "Newlywed Game" designs, in which potential patients and potential surrogates respond to hypothetical scenarios to see how often they "get it right." The preoccupation with determining the capacity of surrogates to accurately reproduce the judgments of another makes a number of assumptions that blind scholars to the variables central to understanding how surrogates actually make medical decisions on behalf of another. These assumptions include that patient preferences are knowable, surrogates have adequate and accurate information, time stands still, patients get the surrogates they want, patients want and surrogates utilize substituted judgment criteria, and surrogates are disinterested. This article examines these assumptions and considers the challenges of designing research that makes them problematic.