INTERPAKS, In: Report of an Exploratory Workshop on the Role of Anthropologists and Other Social Scientists in Interdisciplinary Teams Developing Improved Food Production Technology, Los Banos, Philippines: International Rice Research Institute, 1982. p. 73-92, Discusses the contribution that an anthropologist can make to the design of a farming systems program. Describes the program of the Guatemalan Institute of Agricultural Science and Technology which focuses on the farmer as a decision maker. A decision model in constructed and tested and the policy implications of the results are discussed.