Skip to main content
Resource | Research and Data | Impacts/Evaluations Very Low Birthweight Among Medicaid Newborns in Five States: The Effects of Prenatal WIC Participation

This study is an analysis of very low birthweight among Medicaid newborns and the effect of prenatal WIC participation on the likelihood of very low birthweight.

03/01/1992
Resource | Research and Data | Payment Accuracy and Program Integrity 2005 WIC Vendor Management Study

In 1991 and 1998, FNS conducted national studies of WIC vendors to determine the extent of vendor violation of program rules. After the 1998 study, FNS issued regulations to correct vendor practices. The 2005 study replicates the 1998 study to determine whether the regulations were effective, and to measure the frequency of vendor violations and the degree to which vendors charge accurate prices for WIC transactions.

04/27/2007
Resource | Research and Data Survey of the Public Health Nutrition Workforce: 2006-07

Report. Survey of the Public Health Nutrition Workforce: 2006-07

10/29/2007
Resource | Research and Data | Assessing/Improving Operations WIC Participant and Program Characteristics 2006

The WIC Participant and Program Characteristics (PC 2006) report summarizes demographic characteristics of WIC participants nationwide in April 2006, along with information on participant income and nutrition risk characteristics. A national estimate of breastfeeding initiation for WIC infants is included. The report also describes WIC members of migrant farm-worker families.

12/01/2007
Resource | Research and Data | Assessing/Improving Operations WIC Participant and Program Characteristics 2014: Food Package Report

This report is a supplement to the WIC Participant and Program Characteristics 2014 biennial report. It describes the content of Special Supplemental Nutrition Program for Women, Infants, and Children (WIC) food packages for packages or prescriptions issued to WIC participants in April 2014.

02/29/2016
Resource | Research and Data | Food/Nutrient Analysis Nutrient and Food Group Analysis of USDA Foods in Five of its Food and Nutrition Programs - 2014

This study updates a 2009 analysis of the nutrient and food group content of the USDA Foods offered and delivered through federal nutrition assistance programs. The study also estimated the Healthy Eating Index (HEI) scores under the HEI-2010 and the HEI-2005 scoring systems for each program’s benefits.

02/29/2016
Resource | Research and Data | Nutrition Education WIC Nutrition Education Study: Phase I Report

The WIC Nutrition Education Study (NEST) provides detailed information on WIC nutrition education services and includes the following two phases:
-- Phase I: Comprehensive nationally representative description of WIC nutrition education processes and features.
-- Phase II: Pilot study of the impact of WIC nutrition education on nutrition and other behaviors in six WIC sites.
This report presents the Phase I results of the study.

05/31/2016
Resource | Research and Data | National Academy of Sciences/IOM Review of WIC Food Packages: Proposed Framework for Revisions

The phase I interim report, is the second of three reports. The first report, the Evaluation of White Potatoes in the Cash Value Voucher: Letter Report, recommended allowing white potatoes for purchase with the cash value voucher. This second report presents the evidence, analyses, and framework that will be applied to develop the final report (phase II), which will include recommendations for potential modifications to the Special Supplemental Nutrition Program for Women, Infants, and Children (WIC) food packages.

08/01/2016
Page updated: September 16, 2025