The Food and Agriculture Program (PAP) of the International Institute for Applied Systems Analysis (IIASA) has been engaged in the development of a set of linkable national models for agricultural policy analysis since 1976, with the help of a network of collaborating institutions around the world. The purpose of the FAP is to study the effect on the domestic food situation in given countries of alternative policy measures taken by their own governments, by the governments of other countries, and by international organizations.