While Cost-Per-Circulation is a useful statistic for measuring the value of a database, there are many exceptions.
This report shows in house circulation of the library's print titles. Circulation is gathered by placing tally cards behind each title on display and asking users record a tally mark with each use. While this is an imperfect method that undercounts actual use, it does reveal trends in use up or down over time.
This report also tracks circulation for a small number of digital titles that we subscribe to because they do not exist within our 200+ databases or they provide incomplete coverage. In some cases online periodicals come with a one, two, or even five year moratorium. The subscription closes the gap.
The rule for dropping an individual print or digital periodical is less than 5 circulation per year for three years.
Over the last three years, less than a dozen titles passed the criteria for retention, and even then we are averaging just over 100 circulations per year in print, vs.100,000 via our databases.
FYI - 99% of periodical circulation occurs within our databases, not thorough individual subscriptions.