The question of the cost-effectiveness of ownership versus access to s
erials is explored using data collected during a local periodicals use
study and data from the Association of Research Libraries/Research Li
braries Group Cost Study. Analysis revealed that if a periodical is us
ed fewer than five times per year in a given library, it is generally
more cost-effective to rely on access, even if the subscription cost i
s modest. If total in-house use is ten times per year or more, the cos
t-effectiveness of relying art access rather than ownership is distrib
uted unevenly across subject disciplines. An examination of the availa
bility of the group of low-use titles through interlibrary loan and co
mmercial document delivery indicates general availability at the prese
nt time. The impact of periodical cancellations on users' needs is als
o discussed.