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Resource | Research and Data | Assessing/Improving Operations Third National Survey of WIC Participants

The National Survey of WIC Participants (NSWP) study series is designed to describe state and local agency characteristics, examine participants’ characteristics, assess participants’ experiences with WIC, and estimate improper payments resulting from certification errors in WIC. The study is conducted approximately every 10 years, and the current study is the third iteration (NSWP-III) in the series. 

12/14/2021
Resource | Research and Data | Benefit Content/Cost WIC Food Package Cost Report FY 2014

This report supplements FNS administrative data on food package costs by estimating the average monthly food costs for each WIC participant category and food package type. It also estimates total pre- and post-rebate dollars spent on 17 major categories of WIC-eligible foods in FY 2014. This report is an update to the previous WIC Food Package Cost Report for FY 2010.

10/11/2018
Resource | Research and Data | Food Security SNAP: Examining the Evidence to Define Benefit Adequacy

The purpose of this study was to examine how to define “adequacy” of SNAP allotments objectively in the context of program goals to improve food security and access to a healthy diet, existing data sources that could inform an assessment of the adequacy of existing and potential alternative SNAP allotments, and new data requirements to strengthen the evidence-base and allow for further rigorous analyses. 

01/01/2013
Resource | Research and Data | Assessing/Improving Operations Building a Healthy America: A Profile of SNAP

As the time for reauthorization of SNAP again approaches, it is useful to take stock of its accomplishments, identify those features that have contributed to its success, and look for new opportunities to strengthen operations to achieve program goals more fully. To that end, this is a summary of past research on program operations and outcomes.

04/12/2012
Resource | Research and Data | Food Security Hunger and Obesity - Understanding a Food Insecurity Paradigm

The Workshop on Understanding the Relationship Between Food Insecurity and Obesity, held in Washington, DC, from Nov. 16 -18, 2010, was designed to provide an opportunity to explore and illuminate the relationship between food insecurity and obesity, the current state of research, and data and analyses needed to advance understanding of the relationship as a way of countering both hunger and obesity in the United States. 

05/31/2011
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 | Assessing/Improving Operations Making America Stronger: A Profile of the Food Stamp Program

A summary of past research on program operations and outcomes related to the Food Stamp Program.

09/01/2005
Resource | Research and Data | Food Security Impact of Food Stamp Payment Errors on Household Purchasing Power

Most discussion of payment accuracy in the Food Stamp Program focuses on the overall level and cost of payment errors. Rarely does the discussion focus on the impact of payment errors on individual households affected. This analysis – based on 2003 food stamp quality control data – leads to two broad conclusions. First, virtually all households receiving food stamps are eligible. Thus, the problem of erroneous payments is not so much one of determining eligibility, but rather one of attempting to finely target benefits to the complicated and changing circumstances of low-income households. Second, most overpayments to eligible households are small relative to household income and official poverty standards. As a result, most food stamp households are poor, and they remain poor even when overpaid.

03/01/2005
Page updated: May 22, 2025