This presentation was given at the Annual Meeting of the Population Association of America. Washington, DC, March 31-April 2, 2011.

Head Start is one of the largest federally funded early education programs.  Today, Head Start serves more than 900,000 children and has been shown to provide positive outcomes for children.  The Survey of Income and Program Participation (SIPP) directly asks parents if their children are enrolled in a Head Start program, but the SIPP consistently undercounts the number of children in Head Start when compared to administrative records.  This study builds off of previous work that attempts to model the number of children enrolled in Head Start using the American Community Survey (ACS) and the Current Population Survey (CPS).  In producing estimated Head Start enrollment we address and resolve a number of technical and methodical issues:  1) determining Head Start enrollment using proxy measures for eligibility, 2) comparing estimates and determining which survey best estimates Head Start enrollment using proxy measures, 3) determining if there are geographic variations between estimated Head Start enrollment and administrative data, and 4) making recommendations about which survey source comes closest to administrative data counts and providing suggestions about the collection of Head Start and general child care data.