Joshua Leftin

Joshua Leftin

Senior Researcher
  • Supplemental Nutrition Assistance Program eligibility, participation, and dynamics
  • Microsimulation
Focus Areas
  • Nutrition
  • Food Security and Hunger
  • Nutrition and Food Assistance Programs
  • Program Integrity
  • Human Services
About Joshua

Joshua Leftin studies nutrition assistance programs, focusing on their implementation, participation, and impacts. He has played key roles on evaluations of the Supplemental Nutrition Assistance Program (SNAP), Special Supplemental Nutrition Program for Women, Infants, and Children, and National School Lunch and School Breakfast Programs.

Leftin leads an evaluation examining SNAP benefit and eligibility parameters and their alignment with actual expenses of low-income households. He has also worked extensively on annual federal microsimulation and related SNAP data analyses to produce reports on characteristics of SNAP households as well as national and state participation rates. His quick-turnaround simulations and analyses have been instrumental to help policymakers estimate the distributional and cost impacts of proposed SNAP reforms. He has also studied efforts to better reach the underserved elderly and working poor, examined the SNAP Employment and Training program, and developed improvements for SNAP participation surveys.

Before joining Mathematica in 2008, Leftin held positions at the Georgetown Public Policy Institute and ICF International. He holds an M.P.P. and M.A. in economics from Georgetown University.

Key Projects
  • SNAP Food Security

    Mathematica conducted the SNAP Food Security survey between October 2011 and September 2012, to assess the effect of SNAP participation on food security and food spending in the post-ARRA environment of higher SNAP allotments.

  • family in grocery store shopping
    SNAP Analysis for Health Impact Assessment of U.S. Farm Bill

    Two of the changes to the Supplemental Nutrition Assistance Program (SNAP) proposed in the 2014 U.S. Farm Bills were (1) eliminating the standard utility allowance for those receiving a nominal Low-Income Home Energy Assistance Program benefit and (2) eliminating broad-based categorical eligibility for...

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