Abstract: Widespread hunger and malnutrition persist today despite considerable growth in per capita food availability. This has prompted an evolving conceptualization of food security and of mechanisms to attain and maintain food security. This chapter discusses both food security and food assistance programs designed to respond to the threat of food insecurity.

See article here: Food Security and Food Assistance Programs
Chapter by Christopher B. Barrett in Bruce L. Gardner and Gordon C. Rausser, eds, Handbook of Agricultural Economics (Amsterdam: Elsevier Science).