Some of the employees spend $400, some spend $750, and others spend $200 of it. Let us take an example and say that Company A gives all of its 100 employees a bonus of $1,000 each – worth $100,000. After all, once necessities are accounted for, they have less of a need to spend the additional income. At higher levels of income, consumers are more likely to save. Income level is an important aspect of the consumer’s propensity to consume. So it can be at any point in time across a large range of incomes or income gains. ![]() So when income is zero, they rely on loans or charity to buy necessities.Īs we can see from the diagram above, the marginal propensity to consume can be calculated at any point on the line. People will always need basic necessities such as food and water to survive. If we now look at the diagram for marginal propensity to consume, we can see that there is consumption even when income is zero. In this case, the marginal propensity to save is the change in consumer saving ($500) divided by the change in income ($1,000), which equals 500/1,000 = 0.5. If the money is not spent in the economy, it is saved. This then leaves us with the marginal propensity to save. So the formula would divide the new expenditure ($500) by the new income ($1,000), which equals 500/1,000 = 0.5. That represents a $500 change in consumer spending. Now suppose you spend $500 of this new income. If you were to receive a $1,000 bonus this year, you would have $1,000 more than previously – representing a $1,000 change in income. ![]() ![]() So if income increases by $1 and the consumer spends $0.80, the formula would be 0.8 / 1, which equals 0.8. Marginal propensity to consume is equal to the change in consumption divided by the change in income.
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