Shift of supply curve


The following diagrams show the changes in supply due to other than price factorD is the initial demand and S is the initial supply.  Supply curve shifts from S to S1




Reasons for shift of supply curve
            There are many “other than price factors which determine the supply”, they are (1) Costs or production (2) Taxes and subsidies (3) Weather conditions and seasons (4) Technological advancement (5) Laws and regulations (6) Number of suppliers (7) Availability of stocks (unexpected events).  

 (1) Costs of production.  When the prices of factors of production increase the suppliers would not be able to produce as much as they did before and the supply curve shift leftwards and vice versa.
(2) Taxes and subsidies.  A tax on a commodity may be regarded as an increase in the cost and supply reduces thus the supply curve shift towards left.  A subsidy would lower the cost and the suppliers can increase their supply, so the supply curve shifts towards left.
(3) Weather conditions and seasons.  Supply of agricultural products is seriously affected by variations in weather conditions and seasons.  This would cause an increase in the cost of production of commodities depending on agricultural output.  So a bad harvest means a decrease in supply and the supply curve move towards left, and a bumper harvest will have an opposite effect. 
(4) Technological progress.  Technological progress refers to improvements in the overall performances of factors of production in quality and quantity.
(5) Laws and regulations. The amount of goods supplied to the market can be affected by the country’s laws and regulations. [Industrial quota and price control will affect the supply].
(6) Number of suppliers.  When the number of suppliers increase there would be an increase in the supply to the market [In case of monopoly (single producer) situation, supply is often reduced so as to create an artificial shortage to increase prices]
(7) Availability of stocks (unexpected events).   Excess or shortage  stock of goods can also make changes in the supply. War or natural disasters will also adversely affect the supply of goods.  
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