It is commonly known that per capita income is correlated with the level of
health care spending and that technology is a major factor in explaining t
he increase in health care spending. This study examines differences in the
rate of diffusion of medical technologies in Organization for Economic Coo
peration and Development countries between 1975 and 1995. We find that the
importance of income in explaining the long-term availability of a technolo
gy generally declines over time and becomes insignificant for some technolo
gies. In other words, more affluent countries are earlier adopters of new t
echnologies, but access to technology becomes less dependent on income over
time. The evidence also suggests that the effects of reimbursement incenti
ves are greater for purchases of diagnostic technologies than for lifesavin
g technologies and that reimbursement incentive effects are less significan
t for older technologies. (C) 2001 Elsevier Science Ireland Ltd. All rights
reserved.