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The National Beneficiary Survey (NBS), sponsored by the Social Security Administration’s (SSA’s) Office of Retirement and Disability Policy, collects data on the employment-related activities of working-age beneficiaries of Social Security Disability Insurance (SSDI) and Supplemental Security Income (SSI). Mathematica has conducted six rounds of the survey since the NBS began in 2004, and we will implement a seventh round in 2019. The first four rounds of the survey—in 2004, 2005, 2006, and 2010—helped glean information about beneficiary impairments; health; living arrangements; family structure; occupation before disability; and use of non-SSA programs (for example, the Supplemental Nutrition Assistance Program, or SNAP). Rounds 1–4 also evaluated the Ticket to Work and Self-Sufficiency program. In Rounds 5–7, we seek to uncover important information about the factors that promote beneficiary self-sufficiency and, conversely, the factors that impede beneficiary efforts to maintain employment.