This project, funded by the Social Security Administration (SSA), tested the impact of offsetting earnings among SSDI beneficiaries above SGA after the trial work period on a 1 for 2 basis rather than stopping payments (as is currently the case). This was a large, multi-site random assignment demonstration and evaluation. MEF Associates was a subcontractor to Abt Associates and had responsibility for implementation of the demonstration in two of ten regions across the country.