MPC Flashcards
MPC
The marginal propensity to consume measures how much of any additional income people are likely to spend rather than save. A fraction that shows the proportion of extra income that goes towards consumption.
MPC formula
Change in consumption/Change in income. E.g. £80 spent/£100 extra income= 0.8 MPC
Higher MPC
Means people spend a larger portion of their extra income. This leads to a bigger impact on the economy as more spending stimulates demand
Lower MPC
Means people save more of their extra income. This creates a smaller impact on the economy as less money circulate.
High income individuals
We assume that they have a low MPC as people with higher incomes are more likely to save a larger proportion of any additional income because they already have enough for their needs and wants.
Low income individuals
We assume they have a higher MPC as those with lower income tend to spend a larger proportion of any additional income because they have more unmet wants and needs or necessities to purchase.
MPC and income
MPC is inversely related to income levels. This matters as government policies targeting low income groups may generate a big multiplier effect because more of the additional income gets spent stimulating demand and vice versa.