Two notions of accountability embodied in proposals to reform managed
care have different ethical implications. Market accountability requir
es plans to inform purchasers and consumers about performance and opti
ons, in theory legitimizing limits to care through consumer choice. Re
cognizing the limits of consumer choice, accountability for reasonable
ness requires that the rationales for limits to services be public and
be based on reasons or rules that ''fair-minded'' people can agree ar
e relevant to pursuing appropriate patient care under necessary resour
ce constraints. Accountability for reasonableness educates clinicians
and patients about the need for limits and empowers a more focused pub
lic deliberation in which ultimate authority for limiting care rests w
ith democratic processes.