As a nation's average household income rises, the percentage of household income that goes to food expenditures also increases.

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As a nation's average household income rises, the percentage of household income spent on food typically decreases, a phenomenon known as Engel's Law. This is because as income increases, the proportion of income spent on food decreases, while spending on other goods and services increases.

As a Nation's Average Household Income Rises, the Percentage of Household