The multiple changes in income and output that results from a change in autonomous expenditure is called the multiplier.

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The multiplier is a concept in economics that refers to the relationship between changes in autonomous expenditure and changes in total income or output. It measures the degree to which a change in one variable leads to a larger change in another variable, and is calculated as the ratio of the change in equilibrium output or income to the initial change in autonomous expenditure. Thus, when autonomous expenditure changes, the resulting changes in income and output are often multiplied by a factor equal to the multiplier.

The Multiple Changes in Income and Output That Results from a Change