Using collection comparison reports produced by the Center for Research Libraries (CRL), a Serials & Journals Working Group analyzed the collections of the participating EAST libraries and considering factors such as holdings levels within EAST, OCLC WorldCat holding levels, JSTOR availability, format, commitments from other shared print programs, and subjects agreed on a set of retention models. These models were approved by Voting Members at participating libraries and the EAST Executive Committee. CRL applied the retention rules to the collective collection and allocated retention responsibility to individual libraries, which then had the opportunity to review their retention proposals and report which specific titles they would agree to retain.