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Law of Supply - Assumptions of the Law of Supply

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Topics

  • The Productive Mechanism
  • Factors of Production
  • Theory of Demand and Supply
  • Elementary Theory of Demand
    • Concept for Demand
    • Types of Demand
    • Individual Demand and Market Demand
    • Determinants of Demand Or Demand Function
    • Individual Demand Function
    • Market Demand Function
    • Law of Demand
    • Statement of the Law of Demand
    • Assumptions of Law of Demand
    • Explanation of the Law of Demand
    • Causes of Operation of Law of Demand
    • Exceptions to the Law of Demand
    • Changes in Demand
    • Causes Behind Shifts of Demand Curve
    • Distinction Between Extension of Demand and Increase in Demand
    • Distinction Between Contraction of Demand and Decrease in Demand
  • Elasticity of Demand
  • Market
  • Banking in India
  • Theory of Supply
    • Concept of Supply
    • Difference Between Supply and Stock
    • Types of Supply
    • Factors Affecting Supply (Or Determinants of Supply)
    • Supply Schedule
    • Supply Curve
    • Law of Supply
    • Statement of the Law of Supply
    • Assumptions of the Law of Supply
    • Explanation of the Law of Supply
    • Reasons Behind the Operation of the Law of Supply
    • Exceptions to the Law of Supply
    • Change in Quantity Supplied (Or Movements Along the Supply Curve)
    • Change in Supply (Or Shifts of Supply Curve)
    • Distinction Between Change in Quantity Supplied (Or Movement Along Supply Curve and Change in Supply Or Shift of the Supply Curve)
    • Distinction Between Expansion in Supply and Increase in Supply
    • Distinction Between Contraction in Supply and Decrease in Supply
    • Elasticity of Supply
  • Demonetisation
    • Demonetisation
  • Inflation
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    • Monopoly
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  • Introduction to Public Finance
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  • Public Expenditure
    • Concept for Public Expenditure
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  • Public Debt
    • Meaning of Public Debt
    • Difference Between Public and Private Debts
    • Types of Public Debt
  • Inflation
    • Introduction of Inflation
    • Wholesale Price Index (WPI)
    • Consumer Price Index (CPI)
    • Food Basket
    • Relationship Between Value of Money and Price Level
    • Types of Inflation
    • Demand Pull Inflation
    • Cost Push Inflation
    • Effects of Inflation
  • Consumer Awareness
    • Factors Causing Exploitation of Consumers
    • Rise of Consumer Awareness
    • Legal Measures Available to Protect Consumers from Being Exploited (COPRA, RTI)
    • Awareness of Food Adulteration and Its Harmful Effects
    • Consumer Awareness
    • Consumer is Exploitation
    • Consumer Movement
    • Concept of Consumer Rights
    • Food Adulteration
    • Consumer Protection Act 1986 (COPRA)
    • Right to Information Act 2005
    • Understanding the Importance of Educating Consumers of Their Rights
    • Consumer Duties
    • Standardisation of Product

Notes

Assumptions of the law :

The law of supply is based on the following assumptions :
1) Constant cost of production :
It is assumed that there is no change in the cost of production .A change in cost of production will affect the profits of the seller. Therefore less quantity will be supplied at the same price.
2) Constant technique of production :
It is also assumed that technique of production does not change. Improved technique of production may lead to an increase in production. This in turn may lead to an increase in the supply at the same price.
3) No change in weather conditions :
It is assumed that there is no change in the weather conditions. Natural calamities like floods, earthquakes etc. may decrease supply.
4) No change in Government policy :
It is also assumed that government policies like taxation policy, trade policy etc. remain unchanged.
5) No change in transport cost :
It is assumed that there is no change in the condition of transport facilities and transport cost. For example, better transport facility increases supply at the same price.
6) Prices of other goods remain constant :
Prices of other goods are assumed to remain constant. If they change, the law of supply may not hold true because producer may transfer resources to other products.
7) No future expectations :
The law also assumes that the sellers do not expect future changes in the price of the product.

Law of supply is explained with the help of the following schedule and diagram :

It explains the direct relationship between price and quantity of commodity supplied. When price rises from ₹10 to ₹20, 30,40 and 50, the supply also rises from 100 to 200,300, 400 and 500 units respectively. It means, when price rises supply also rises and when price falls supply also falls. Thus, there is direct relationship between price and quantity supplied which is shown in following figure:

In the figure above, X axis represents quantity supplied and Y axis represents the price of the commodity. Supply curve 'SS' slopes upwards from left to right which has a positive slope. It indicates a direct relationship between price and quantity supplied.

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