This report reviews the impact of the categorical eligibility provision of the Food Security Act of 1985 (FSA) on the program participation, administrative costs, and error rates of the Food Stamp Program (FSP). The Act automatically granted eligibility for the FSP to households composed entirely of participants in the Aid to Families with Dependent Children (AFDC) and Supplemental Security Income (SSI) programs. The following primary conclusions are reported: (1) while total participation is very unlikely to be substantially increased, some specific types of households may gain eligibility; (2) there is some potential for impact on administrative costs, but further research is needed to determine the magnitude and direction of these effects; and (3) any reduction in error rates will be the indirect result of increases in the amount of caseworker time available for each case, rather than a direct result of the provisions themselves. Recommendations for further research are suggested. Six tables of statistical data are included. A 27-item bibliography is appended. (FMW)