This supplement contains additional information for the report, "Support for the Journey Home: An Impact Study of the Returning Citizens Stimulus Program." The Returning Citizens Stimulus (RCS) program was a pilot program for reentry cash support and aimed to help people quickly reach stability in their lives outside of prison and reduce recidivism as a result. MDRC was contracted by the Center for Employment Opportunities to conduct a two-part evaluation of the RCS program. The recidivism impact study is the first-ever study known to the author to estimate the effect of a large-scale program of this kind on recidivism outcomes. The information covered in this supplement includes: (1) the propensity score matching procedure; (2) impact analyses; and (3) sensitivity checks conducted. [Funding provided by the Center for Employment Opportunities.]