B Com Exam  >  B Com Notes  >  Macro Economics  >  MPS, APS, MPC, APC - Macroeconomics

MPS, APS, MPC, APC - Macroeconomics | Macro Economics - B Com PDF Download

Marginal Propensity to Consume and Marginal Propensity to Save


The MPC makes up the gradient of the consumption line and the MPS makes up the gradient of the savings line in the consumption function.

MPS, APS, MPC, APC - Macroeconomics | Macro Economics - B Com

Marginal Propensity to Consume

The Marginal Propensity to Consume (MPC) measures the increase in household consumption from an increase in household income. 

To calculate MPC:

MPC = (Change in Consumption)/(Change in Disposable Income)

Can you calculate the MPC from the model below?

MPS, APS, MPC, APC - Macroeconomics | Macro Economics - B Com

 

Answer:

Change in Consumption (Consumer Spending):

= 600-500

= 100

Change in Disposable Income:

= 900-500

= 400

MPC: 

= 100/400

= 0.25

Average Propensity to Consume (APC)

Average Propensity to Consume measures the proportion of income spent on consumption.

APC = Total Consumption/Total Disposable Income

Can you find what the APC is from figure 1?


Answer:

Total Consumption = 600

Total Disposable Income = 900

APC

= 600/900

= 0.67


Note: As income increases, the APC decreases.


Marginal Propensity to Save

Marginal Propensity to Save (MPS) measures the increase in savings from a given increase in household income.

MPS = (Change in Savings)/(Change in Disposable Income) OR  MPS = 1 - MPC

Can you find what the MPS is from figure 2?

MPS, APS, MPC, APC - Macroeconomics | Macro Economics - B Com

Answer:

Method 1 - Find MPC

Change in Consumption 

= 625-500

= 125

Change in Disposable Income

= 1000-500

= 500

MPC = 125/500

= 0.25

MPS = 1 -0.25

= 0.75 

Method 2 - Find MPS

Change in Savings 

= 375 - 0 (Note: the savings level at a disposable income of 500 is 0)

= 375

Change in Disposable Income

= 1000-500

= 500

MPS = 375/500

= 0.75

Average Propensity to Save (APS)

Average Propensity to Save (APS) measures the total proportion of income that is saved. 

APS = Total Savings/ Total Income

Can you find the APS of figure 2?

Answer:

Total Savings = 375

Total Income = 1000

APS = 375/1000

= 0.375

Note: As income increases, the APS increases. 

The document MPS, APS, MPC, APC - Macroeconomics | Macro Economics - B Com is a part of the B Com Course Macro Economics.
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FAQs on MPS, APS, MPC, APC - Macroeconomics - Macro Economics - B Com

1. What is the meaning of MPS in macroeconomics?
Ans. MPS stands for Marginal Propensity to Save in macroeconomics. It measures the change in saving resulting from a change in income. It indicates the proportion of additional income that individuals save rather than spend.
2. What is the significance of APS in macroeconomics?
Ans. APS refers to Average Propensity to Save in macroeconomics. It is the ratio of total saving to total income. APS helps in understanding the saving behavior of individuals or households in an economy.
3. How is MPC calculated in macroeconomics?
Ans. MPC stands for Marginal Propensity to Consume in macroeconomics. It is calculated as the change in consumption divided by the change in income. MPC measures the proportion of additional income that individuals spend rather than save.
4. What does APC represent in macroeconomics?
Ans. APC stands for Average Propensity to Consume in macroeconomics. It is calculated as the ratio of total consumption to total income. APC indicates the proportion of total income that individuals or households spend on consumption.
5. How do MPS and APC relate to each other in macroeconomics?
Ans. MPS and APC are related to each other in macroeconomics. The sum of MPS and APC always equals 1. This means that any change in income is either saved (MPS) or consumed (APC). As one increases, the other decreases, and vice versa.
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