SURVEYS HAVE PROVIDED magnificent information about the health of the
American people, but they rarely con-tribute to our understanding of h
ow medical services affect people's health. The authors explore the op
portunity to harness the medical services system to provide informatio
n that clarifies the relationship between people's health and the serv
ices they receive. They also note the risk posed by managed care-that
competition and cost-cutting may pit the health industry against acces
s to and standardization of health services data-but see hope in recen
t legislation.