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Resource | Research and Data | Payment Accuracy and Program Integrity WIC Erroneous Payments to Vendors: Annual Estimates for FY 2011

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.

12/01/2012
Resource | Research and Data | Participation Rates Reaching Those in Need: State SNAP Participation Rates in 2010

This report – the latest in an annual series – presents estimates of the percentage of eligible persons, by state, who participated in SNAP during an average month in FY 2010 and in the 2 previous fiscal years. This report also presents estimates of state participation rates for eligible “working poor” individuals (persons in households with earnings) over the same period. Although SNAP provides an important support for working families, the working poor has participated at rates that are substantially below those for all eligible persons.

12/01/2012
Resource | Research and Data | Participation Rates SNAP Participation Rates: Fiscal Year 2010

This report is the latest in a series on SNAP participation rates. Estimates are based on the March 2011 Current Population Survey and program administrative data for fiscal year 2010. The findings represent participation rates for FY 2010.

12/01/2012
Resource | Research and Data | Payment Accuracy and Program Integrity WIC Erroneous Payments to Vendors: Annual Estimates for FY 2010

This report provides improper payment estimates for FY 2010 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.

05/01/2012
Resource | Research and Data | Payment Accuracy and Program Integrity WIC Erroneous Payments to Vendors: Annual Estimates for 2009

This report provides improper payments estimates for FY 2009 using a methodology for “aging” the 2005 bookend study. This updates previous reports providing estimates from 2005 to 2008.

05/01/2012
Resource | Research and Data | Payment Accuracy and Program Integrity Improper Payments to WIC Vendors 2005-2008

About every 7 years, FNS performs a nationally representative study to examine the extent of error and abuse among food vendors authorized to accept WIC vouchers. The last bookend study was the 2005 WIC Vendor Management Study, which used fiscal year 2005 expenditure data to derive an estimate for 2004. Between bookend studies, there is a need to derive annual estimates of the level of improper payments for compliance with the Improper Payments Information Act of 2002. The purpose of the subsequent annual studies was to provide annual updates to the bookend studies using the developed aging methodology.

05/01/2012
Resource | Research and Data | Participation Characteristics National Survey of WIC Participants II

This report, the first of three, addresses the first objective of the study, which is to explore the characteristics and experiences of WIC participants.

04/01/2012
Resource | Report to Congress A Report to Congress – Executive Summary

This report responds to a Congressional mandate for FNS to establish a long-range plan for the development and implementation of state agency Management Information Systems in the Special Supplemental Nutrition Program for Women, Infants and Children.

03/20/2012
Resource | Research and Data | Breastfeeding Evaluation of the Birth Month Breastfeeding Changes to the WIC Food Packages

In 2006, FNS asked the Institute of Medicine to review the WIC food packages. The IOM proposed major changes to improve nutrition and encourage breastfeeding but also expressed the concern that changes related to partial breastfeeding may have unintended consequences. The IOM recommended that FNS conduct an impact study evaluating the birth month breastfeeding changes to the WIC food packages. 

01/05/2012
Resource | Research and Data | Assessing/Improving Operations Effects of WIC: A Review of Recent Research

This report begins with an overview of the WIC program, including its administrative structure and benefits, and a detailed description of the literature search protocol used to identify the studies included.

01/02/2012
Page updated: September 16, 2025