This brief examines the differences in the use and cost of personal assistance services in states that do and do not provide these services through their state plans. States that offer these services through their state plans appear to provide them to a greater number of beneficiaries at a lower...

This report presents the sampling design and data collection activities for round 4 (2010) of the Social Security Administration’s National Beneficiary Survey (NBS). It also provides descriptive statistics on working-age individuals receiving Supplemental Security Income and Social Security...

As part of the evaluation of the American Recovery and Reinvestment Act (ARRA) investment in comparative effectiveness research (CER), Mathematica developed a conceptual framework to guide future efforts to assess the impact of CER. In addition, we explored methodological challenges related to...