This report provides improper payment estimates for fiscal year 2011 using a methodology for “aging” the 2005 bookend study. The methodology yields nationally representative estimates of the number of vendors that over- and undercharged and the amount of over- and undercharges across all WIC vendors.

This report fulfills the request from Congress in the House Appropriations Committee Report (HR 107-116), which accompanied the Agriculture Appropriations Act for fiscal year 2002.