The market competition paradigm assumes that health plans will compete
on many factors, including quality of care. Unfortunately, for many r
easons health plans have not made a substantial effort to distinguish
themselves an quality. The antitrust laws that are designed to protect
competition allow selective collaboration among competitors far vario
us purposes, including quality improvement. Within antitrust constrain
ts, specific opportunities exist for competing health plans to collabo
rate to improve quality. Their success will depend on purchasers' abil
ity to demand such collaborative efforts as part of their overall purc
hasing strategy.