Most of the resources available through the Library come from companies called aggregators who licence content from other publishers. Aggregators are particularly good at packaging subject-specific content from a number of publishers into one resource (e.g Education Database). Some publishers delay access to some full-text content through aggregators, so that they can generate income by restricting access to those who have directly paid for it through a subscription. Publishers say that such embargoes are important to maintain subscription levels, but others disagree, saying that removing embargoes won't make any difference to the number of subscriptions.
