Mathematica is one of two policy research centers that lead the SSA's Disability Research Consortium. The DRC fosters new research from a team of disability policy experts from Mathematica and three universities.
- Impacts of public policy on the employment and income of people with disabilities
- Use of administrative and survey data for research on working-age people with disabilities
- Employment and Income Support
- Statistics and Measurement
- Data Analytics
- Transition to Adulthood
David Wittenburg is an expert in interventions to promote employment for people with disabilities, particularly interventions that serve youth as they transition into adulthood. He has two decades of experience in evaluation design and program evaluation for several federal agencies.
Wittenburg leads business development activities related to disability projects. He recently worked in senior leadership roles on three Social Security Administration demonstration projects, helping to design and implement experimental and nonexperimental approaches to assess the efficacy of return-to-work interventions for people with disabilities.
Wittenburg, who joined Mathematica in 2005, presents his findings to diverse research and policy audiences, including in congressional testimony, conference presentations, reports, and journal publications. He edited two special journal volumes on employment topics related to people with disabilities for the IZA Journal of Labor Policy and the Journal of Disability Policy Studies. A member of the National Academy of Social Insurance and formerly a senior associate at the Urban Institute and the Lewin Group, he holds a Ph.D. in economics from Syracuse University.
Disability Statistics and Measurement Rehabilitation Research and Training Center (STATS-RRTC)
The mission of the Rehabilitation Research and Training Center on Disability Statistics and Demographics (StatsRRTC) is to narrow and actively bridge the divide between the producers and end users of disability statistics, thereby supporting better data collection, more accurate information, better decision-making,...
Employment Policy and Measurement Rehabilitation Research and Training Center
Mathematica is partnering with the University of New Hampshire’s Employment Policy and Measurement Research and Rehabilitation Training Center (RRTC) on a five-year grant from the U.S. Department of Education, National Institute on Disability and Rehabilitation Research to study and measure the impact...
Accelerated Benefits Demonstration
This demonstration tested the efficacy of providing immediate medical benefits to Social Security Disability Insurance beneficiaries. Under current law, these beneficiaries must wait 24 months before becoming eligible for Medicare. During this time, a beneficiary's health may deteriorate for a number...
Mathematica Experts to Speak at Disability Data Conference
Mathematica experts to speak at conference on disability statistics.
Alternatives to Benefit Receipt: Special Journal Edition Offers Insights for Reducing Reliance on Disability Support Programs and Promoting Employment of People with Disabilities
A special issue of the IZA Journal of Labor Policy, compiled and co-edited by Gina Livermore, David Neumark, and David Wittenburg, explores the evolution of disability policy in the U.S., the factors contributing to growth in the disability rolls, and the potential for early interventions and employment...
CSDP Forum: Getting a Job, Keeping a Job: Services and Supports that Promote Employment Among People with Disabilities
The employment of people with disabilities has become a topic of growing national concern. Over the past three decades, these individuals have experienced consistently low employment rates and high poverty rates, along with increased reliance on public programs. The rapid growth of the Social Security...