Estimates of the Phillips curve suggest that the low level of unemploy
ment over the last few years should have produced a fairly significant
increase in the rate of inflation, yet inflation has continued to fal
l. Some take this occurrence as evidence that the NAIRU has declined.
Others argue that special factors, such as recent movements of employe
e health coverage to health maintenance organizations, have temporaril
y masked the increase in inflation. Perhaps the most widely cited expl
anation for the surprisingly good inflation performance of late concer
ns the increasing sensitivity of the U.S. economy to foreign economic
conditions; specifically, many have argued that since capacity utiliza
tion abroad has been slack in recent years, U.S, inflation has remaine
d mild. This study uses a variety of approaches to examine whether U.S
. inflation depends on foreign, rather than domestic, capacity constra
ints. The author shows that foreign capacity plays little, if any, rol
e in the determination of U.S. inflation independent of any role it mi
ght play in the determination of U.S. capacity utilization. He caution
s that anyone who believes in a world where we no longer need worry ab
out domestic capacity constraints will eventually be rudely awakened b
y data that suggest otherwise. His results indicate that the Phillips
curve, relating some measure of U.S, capacity utilization to U.S. infl
ation, is alive, if ailing a bit, even as the world gets more integrat
ed.