Marginal Propensity to Consume ● Measures the ratio of the change in consumption to the change in disposable income that produces the change in consumption.

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Presentation transcript:

Marginal Propensity to Consume ● Measures the ratio of the change in consumption to the change in disposable income that produces the change in consumption ● Expressed as a number from 0 to 1 o 1: For every additional dollar a person receives, they spend all of it o 0: For every additional dollar a person receives, they spend none of it o.5: For every additional dollar a person receives, they spend 50 cents of it Slide 1

Marginal Propensity to Save ● Measures the the ratio of the change in saving to the change in disposable income that produces the change in saving ● Expressed as a number from 0 to 1 o 0: For every additional dollar a person receives, they save none of it o 1: For every additional dollar a person receives, they save all of it o.8: For every additional dollar a person receives, they save 80 cents of it Slide 2

Relationship Between MPC and MPS ● When a person receives a dollar, they can either spend it or save it ● Thus, the marginal propensity to consume and marginal propensity to save will equal 1 when added together o If the marginal propensity to consume is.8, 80 cents out of every additional dollar is spent o This leaves 20 cents to be saved ● 1 - MPC = MPS Slide 3

Multiplier Effect Economic Agent Spends Money Slide 4 Business Spends Money Individual Spends Money Business Spends Money Individual Spends Money Money flows to business Money flows to individual Money flows to business Money flows to individual

Spending Multiplier Slide 5 ● Spending multiplier o Used when an economic agent spends money in the economy o 1/1-MPC or 1/MPS  Example: Individual spends $500. MPC of.75. How much economic growth will the spending create? ● 1/1-.75 = 4 ● 4 X $500 = $2,000 of additional economic growth