A keystone of the competitive strategy in health insurance markets is
the assumption that ''consumers'' can make informed choices based on t
he costs and quality of competing health plans, and that selection eff
ects are not large. However, little is known about how individuals use
information other than price in the decision making process. This rev
iew summarizes the state of knowledge about how individuals make choic
es among health plans and outlines an agenda for future research. We f
ind that the existing literature on health plan choice is no longer su
fficient given the widespread growth and acceptance of managed care, a
nd the increased proportion of consumers' income now going toward the
purchase of health plans. Instead, today's environment of health plan
choice requires better understanding of how plan attributes other than
price influence plan choice, how other variables such as health statu
s interact with plan attributes in the decision making process, and ho
w specific populations differ from one another in terms of the sensiti
vity of their health plan choices to these different types of variable
s.