Introduction to the Manual Food security, assuring to all human beings the physical and economic access to the basic foods they need, is a broad, cross-cutting issue which has implications for a number of Different sectors in the economy. Food security is often associated with food self-sufficiency-) and the need to grow more food. However, in reality it has much stronger links with issues of' poverty, employment and income generation. For low income economies, where a large percentage of the population live in rural areas and depend on agriculture for their income, increasing food production may be an important element in increasing food security, but only because it increases small farmer income. In this manual, we set out a framework for assessing food security in an economy, and develop a model for evaluating the impact of economic policy measures, and in particular the package of policy measures often referred to as adjustment policy, on food security in a country. This manual has been produced as part of FAO's overall commitment to providing training materials in food and agricultural policy analysis. In particular, FAO sees the need to improve the capabilities of agencies dealing in both food and agricultural policy and macroeconomic policy in understanding and allowing for the cross relationships of macro and sectoral policies and to assess their impact on the rural population. This manual differs from other approaches to agricultural policy analysis, in so far as it does not primarily address such issues as policy impact on the functioning of agricultural markets, or the trade-off between different policy goals. Here, we are interested in how policy measures, undertaken for macro-economic objectives, affect the availability and access to food at the individual and household level. We also examine options for improving food security in the short-term which are consistent with longer-term macro-economic stability. The manual is being published shortly after the World Food Summit, held in Rome at FAO headquarters, in November 1996. It is hoped that the World Food Summit will give renewed impetus to tackling issues of food security and that this manual will prove a useful tool in improving understanding of a complex, multi-sectoral issue. The manual is not addressed directly to policy makers. The material contained within it is of a fairly technical nature and is aimed rather at policy analysts, those who have to prepare policy briefs and background papers to inform decision makers, particularly those working in agencies, whether governmental or non-governmental, which deal with food issues. The manual could also be useful in sensitising economists, in finance ministries or central banks, dealing with macro-policy issues having implications on food security. To get most benefit from the use of the manual, some prior knowledge of economics and policy analysis is desirable. The manual falls into two main sections. The first, containing Chapters 1 through 3, sets out the basic framework within which food security is addressed. Chapter I discusses the major concepts used when analysing food security, examines recent trends in the world food economy, links food security with other major policy objectives such as poverty alleviation and environmental protection, and discusses the connection between food security and self-