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Economic Definition of MPG. Defined.

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Term MPG Definition: The abbreviation for marginal propensity for government purchases, which is the proportion of each additional dollar of national income that is used for government purchases. Or alternatively, this is the change in government purchases due to a change in national income. Abbreviated MPG, the marginal propensity for government purchases is the slope of the government purchases line used in the analysis of Keynesian economics. As such, it also plays a role in the slope of the aggregate expenditure line and the multiplier effect.

 

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