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Resource | Research and Data WIC Infant and Toddler Feeding Practices Study-2: Ninth Year Report

This report, in the WIC Infant and Toddler Feeding Practices Study 2 (WIC ITFPS-2)/ “Feeding My Baby” Study analyzes the long-term impact of the USDA’s Special Supplemental Nutrition Program for Women, Infants, and Children (WIC) by gathering information on caregivers and children over the first nine years of the child's life after enrollment in WIC, regardless of their continued participation in the program.

05/22/2025
Resource | Research and Data | Participation Rates Estimates of WIC Eligibles and Program Reach in 2014

This report, the latest in a series of annual reports on WIC eligibility, presents 2014 national and state estimates of the number of people eligible for WIC benefits and the percent of the eligible population covered by the program, including estimates by participant category.

09/29/2017
Resource | Research and Data | Assessing/Improving Operations WIC Vendor Peer Group Study

The purpose of this study is to evaluate the effectiveness of state agencies current peer group systems, and to provide guidance to state agencies on how to evaluate and update their systems. Specifically, it uses empirical analysis to identify one or more effective models for establishing vendor peer groups that could apply to most state agencies.

05/31/2017
Resource | Research and Data | Food/Nutrient Analysis Review of WIC Food Packages: Improving Balance and Choice

The National Academies of Sciences, Engineering, and Medicine  convened an expert committee to review and assess the nutritional status and food and nutritional needs of the WIC-eligible population and provide recommendations based on its review and grounded in the most recently available science. The committee produced three reports as part of this task. 

01/05/2017
Resource | Research and Data | Food/Nutrient Analysis Diet Quality of Young American Children by WIC Participation Status: Data from the National Health and Nutrition Examination Survey, 2005-2008

This report uses data from the National Health and Nutrition Examination Survey to provide a comprehensive picture of the nutrient intakes, food choices, and diet quality of young children who are WIC participants, income-eligible nonparticipants, and higher income participants.

05/05/2015
Data Visualization
Estimates of WIC Eligibility and Program Reach

Each year, FNS estimates the number of eligible individuals for WIC during an average month of the calendar year. FNS uses estimates of the number of individuals eligible for WIC and the number likely to participate to better predict future funding needs, measure WIC performance, and identify potentially unmet nutrition assistance needs.

11/03/2014
Resource | Research and Data | Payment Accuracy and Program Integrity 2013 WIC Vendor Management Study

This study is part of a larger FNS effort to ensure WIC program integrity and to comply with the Improper Payments Information Act of 2002 which requires FNS to estimate improper payments in its programs.

11/26/2013
Resource | Research and Data | Assessing/Improving Operations WIC Food Package Cost Report, FY 2010

This report estimates the average monthly food costs for each of 5 WIC participant subgroups and estimates total dollars spent on 17 major categories of WIC-eligible foods in FY 2010. The participant and food level costs in this report are USDA’s first estimates since implementation of the 2009 WIC food package changes.

08/21/2013
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 | 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
Page updated: September 16, 2025