Figure 6-1 illustrates measures that might be used for studying the impact of WIC food packages.
To address the question of whether WIC improves dietary intakes and nutritional status, it is useful to consider two early steps as they relate to the food package: voucher pick-up and redemption, and the consumption of WIC foods.
Prior research Administrative data are available that can be used to examine voucher pick-up and redemption, but they have seldom been used. The WIC Cost Containment Study (USDA/ERS, 2003) found that voucher pick-up across six states declined during the certification period, dropping from about 100 percent in the first month to between 73 and 84 percent by the sixth month.
Potential research Potential research on voucher redemption could include the following topics: