Greg Tananbaum served as project manager and co-author for the Mellon-funded Pay-it-Forward project, which modeled sustainable Open Access Article Processing Charges. The investigation was a joint initiative of the University of California, under the leadership of UC Davis and the California Digital Library (CDL). It included input from three major research libraries (Harvard University, Ohio State University and the University of British Columbia), the ten University of California campus libraries, the Association of Learned and Professional Society Publishers, Thomson Reuters (Web of Science), and Elsevier (Scopus).