摘要：Food spending varies widely
around the world. For example,
residents of high-income
countries spend an average of 16
percent of their income on food,
compared with 35 percent in middle-
income countries, and 55 percent
in low-income countries. Household
income, food prices, and the composition
of diets greatly affect food expenditures.
As incomes rise, a
smaller share of expenditures is devoted
to food, diets become more diverse,
and caloric intake increases
up to a point where satiation sets in.
A closer look at these components
helps us understand trends in food
spending, consumption, and trade.
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