The Scientific Registry of Transplant Recipients is established through a contract to Arbor Research by HRSA (AHRQ’s predecessor). The SRTR is an ever expanding national database of transplant statistics that supports ongoing evaluation of the scientific and clinical status of solid organ transplantation. This information is used to help develop evidence-based policy, to support analysis of transplant programs and organ procurement organizations, and to encourage research on issues of importance to the transplant community. From 2000 to 2010, Arbor Research, as the SRTR contractor, and in collaboration with U-M, developed Simulated Allocation Models (SAMs) to study and report on changes in kidney, liver, and lung transplant practices that followed changes in allocation policies. This research contributed to thousands of additional life-years saved by organ transplantation by evidence-based changes to deceased donor organ allocation in the U.S.