This report summarizes four selected food stamp research studies made by analysts in the Economics, Statistics, and Cooperatives Service, U.S. Department of Agriculture. The studies focused on the Food Stamp Program's (FSP) effect on food prices, sales by region, size, and kind of participating store, and where and on which food items the stamps are used. The studies were chosen for review because of their potential interest to consumers and food retailers. A list of the studies follows this report.