PSYCHOLOGICAL LAW OF CONSUMPTION
• J.M. Keynes
• Book : The General theory of Employment, interest and money ( 1936)
• Also known as Fundamental Psychological law
ASSUMPTIONS
• Normal Conditions
• Consistency of psychological and institutional factor
no change in Population, Habits, taste etc.
• Capitalist economy based on laissez fair
EXPLANATION
• Based on the relationship between aggregate consumption and income.
• LAW : The psychological law of consumption is such that when aggregate real income is increased , aggregate consumption is also increased but not by so much as income.
• MPC is always Positive but less than one
The law is Based on 3 interrelated propositions :-
1. When aggregate income increases consumption expenditure also increases but less proportionately.
2. Increment in the level of income is always divided into Consumption expenditure & Saving
3. An increase in income , leads to an increase in Consumption as well as Savings.
Income Consumption. Saving
0 120 -120
100 200 -100
200 280 -80
300 300 0
400 380 20
500 460 40
Implications
• Strategic importance of investment
• Possibility of general over production and unemployment
• Refutation of say’s law
• Decline in MEC
• Underemployment equilibrium
• State intervention
• Unique process of income generation
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