Gemini Observatory, Subaru Telescope, and Keck Observatory collectively operate five 8-10 meters telescopes on the summit of Mauna Kea on the Island of Hawaii and at Cerro Pachon in Chile. The three institutions began a telescope exchange program in 2005 to expand the range of backend instruments available to their respective users, whereby one observatory’s users can apply for telescope time from the other two observatories through the time exchange program. To measure the successfulness of the program, we collected publications resulted from the exchange program for the period from 2005 to 2013. Bibliometric analysis was performed with these publications to measure the productivity and impact of the exchange program. This is an enhanced and updated version of the paper presented at the IAU Commission 5 working Group Libraries session in Beijing, 2012.