If your "center" means "center for scientific review (CSR)", study sections are simply various review committees/panels organized by CSR. Study sections only review and score proposals. (Some contract proposals may be reviewed by individual institute, such as NIAID or NCI). Funding decisions are not made by CSR/study sections - they are made at individual institutes or centers based on the scores or ranking. Therefore, it is difficult (if not impossible) to calculate the funding rate for a speci