This paper presents time series evidence on the voting behavior of mem
bers of the U.S. House of Representatives from 1975 to 1990. The empir
ical results indicate that voting behavior of individual congressmen i
s remarkably stable over time. We find no evidence of economically sig
nificant last term effects on voting behavior, nor are there important
effects of legislative tenure on voting patterns. The most significan
t deviations in voting behavior occur for congressmen who failed to wi
n their reelection bid, suggesting that sizable deviations from previo
us policy positions may result in swift retribution by constituents in
the district.