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When the supply of a commodity rises or falls due to non-price determinants (factors), the supply is said to have increased supply or decreased supply. The increases or decrease or the rise or fall in supply or (movement vs shifts along supply curve) may take place on the account of various factors or determinants:

(i) Changes in factor price. The rise or fall in supply may take place due to changes in the cost of production of a commodity. If the prices of various factors of production used in the production of a particular commodity increase of it total cost of production. There will be reduction in the supply of that commodity at each price because the amount demanded decreases with a rise in price. Conversely, if the prices of the various factors of production fall down, it will result in lowering the cost of production and so an increase in the supply on varying prices.

(ii) Changes in technique. The supply of a commodity may also be affected by progress in technique. If an improvement in technique takes place in a particular industry, it will help in reducing its cost of production. This will result in greater production and so an increase in the supply of the commodity. The supply curve will shifts to the right of the original supply curve.

(iii) Improvement in the means of transport. The supply of the commodity may also increase due to improvement in the means of communication and transport. If the means of transport are cheep and fast, then supply of the commodity can be increased at a short notice at lower price.

(iv) Climatic changes in case of agricultural products. The supply of agricultural products are directly affected by the weather conditions and the use of the better methods of production. If rain is timely plentiful well-distributed; and improve methods of cultivation are employed then other things remaining the same, there will be bumper crops. It would then be possible to increase the supply of the agriculture products.

(v) Political changes. The increase or decrease in supply may also take place due to political disturbances in a country. If country is facing wages wars against another country or some other kind of political disturbances, then the channels of production are disorganized. It results in the decrease of certain goods, the supply curve shifts to the left of originals curve.

(vi) Taxation policy. If a government levies heavy taxes on the import of particular commodities, then the supply of these commodities is reduced at each price. The supply curve shifts to the left, conversely if the taxes on output in the country are low and government encourages the imports of foreign commodities, then the supply can be increased easily. The supply curve shifts to the right of originals supply curve.

(vii) Goals of firms. If the firms expect higher profits in the future, they will take the risk and produce goods on large scale resulting in larger supply of the commodities. The supply curve shifts to the right.