In this paper we develop a model to predict the seniority turnover, an
d transition consequences of term limit reforms for any institution wi
th a regularized procedure for rotating membership. With this model we
can predict the number of members who will be serving in their last t
erm at any given time once an institution reaches a stable state under
term limit reforms. For example, our results show that for the U.S. S
enate current term limit proposals will result in a substantial increa
se in the number of ''lame duck'' members and a significant reduction
in average seniority. We make no claims as to the public policy effect
s of term limit proposals. However, our model can be used to design a
proposal that will maximize any benefits or minimize any public policy
effects found to be associated with term limit reforms.