But this begs the question as to what criteria you use to define "core". If they closely align and support your curriculum, you should see evidence of use. If they aren't being used, then they prima facia do NOT closely align with your curriculum, regardless
of how relevant the publisher has made the title of the journal sound.
In my experience discussing and debating this topic, I have found that many librarians, especially us old timers that long predate online periodicals, are so used to using "proxy" determinations of importance that we've lost sight of the fact that those rubrics
were originally just proxies because we had no way to measure actual use.
Now that we have actual use measures, it's time to discard the proxies.
As to the faculty using other affiliations, we have that a lot, or at least we think we do, being a small university with a lot of faculty who got their PhDs from much larger ones with far bigger collections. I'm of two minds about this philosophically. But
pragmatically, since we're in a constant state of budget crisis and cancellations, my attitude has had to become one of pure triage and that means that if they are happy using another source, then we should free up that budget money to get other titles that
our patrons don't have another source for (as reflected in ILL data, for instance).
Melissa