6 · ARL Statistics 2006–2007
counTing seRiaLs
This year the definition of counting serials in the ARL Statistics was changed from serials subscriptions we changed
to counting serial titles. As a result the trend line of publishing serial cost per subscription is being discontinued and
eventually a new one will emerge as we collect annual data on serial titles. This change though simple at first glance is
very important as it makes the concept of serials more meaningful in the electronic environment.
What prompted this change? In earlier years the instructions for reporting serials were that libraries report the “total
number of subscriptions, not titles, but electronic serials acquired as part of an aggregated package (such as MUSE
or Academic’s IDEAL) were to be counted by title.” Directors and other staff have expressed concern that the serials
count was problematic since many libraries engage in multiple consortia arrangements and the serials count was
inflated by duplicate titles held in multiple packages. The Statistics and Assessment Committee determined that
a new way of counting serials focusing on titles would provide better descriptive data reflecting the true scope of
the content provided by research libraries. A pilot at various ARL libraries demonstrated the feasibility of the new
In the electronic environment once you own or lease a title, it is often accessible by all users so a more authentic
descriptive statistic for the scope of the content is titles rather than subscriptions. A unique title count favors broader
coverage. Any duplication of those titles through packages, aggregations, bundles, etc., becomes more a management
issue. The new definition asks that titles be reported as electronic if available both in print and electronic formats
and they be reported as purchased if available both through purchased and non-purchased arrangements. So, if a
title appears in both print and electronic form and a library has acquired it through several different providers, it
would be counted as one title. Training events were delivered last fall to ensure that there is a well-grounded, shared
understanding of the new definitions.
The outcome has been successful as we have more libraries reporting serials titles than they ever managed to report
serial subscriptions indicating that the new definition is moving us into the right direction of having data that are
both collectable and useful. However, we had to delete all earlier trend lines that were based on serial subscriptions.
A variety of resources have been developed for libraries to consult as they implemented the change and they are
available through http://www.arl.org/stats/annualsurveys/arlstats/07statmail.shtml.
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