Consider a hypothetical closed economy in which households spend $0.65 of each additional dollar they earn and save the remaining $0.35. The marginal propensity to consume (MPC) for this economy is , and the spending multiplier for this economy is .

Marginal propensity to consume or MPC = 0.65

Multiplier or k = 2.85714 rounded off to 2.86

Explanation:

The marginal propensity to consume (MPC) is the proportion of increased disposable income that consumers spend. It is a metric to quantify the induced consumption and how an increase in consumer spending occurs as a result of increase in income.

MPC is calculated as follows,

MPC = Change in consumer spending / change in income

MPC = 0.65 / 1

MPC = 0.65

To calculate the multiplier, we simply use the following formula,

Multiplier or k = 1 / (1 - MPC)

k = 1 / (1 - 0.65)

k = 2.85714 rounded off to 2.86

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