distribution gap measures the difference between
projected food consumption and the amount of food needed to
increase consumption in food-deficit income groups within
individual countries to meet nutritional requirements. Inadequate
economic access to food is the major cause of chronic
undernutrition in developing countries and is related to the level
of income. In the ERS global food security model, the total
projected amount of available food is allocated among different
income groups using income distribution data.
A nutrition gap is estimated to measure
food insecurity. This gap represents the difference between
projected food supplies and the food needed to support per capita
nutritional standards at the national level.
A status quo gap is estimated to measure
changes in food security. This gap represents the difference
between projected food supplies and the food needed to maintain per
capita consumption of the most recent 3-year period.