Benefits transfer, or more generally value transfer refers to applying quantitative estimates of ecosystem service values from existing studies to another context. You take value estimates from a study site and apply them with adjustments to a policy site where time or resource constraints preclude the possibility of doing a primary valuation study. In the value transfer literature values have generally been understood to be monetary estimates of benefits or costs. Value transfer is not one specific method, but a continuum of approaches depending on the information available.