Study Notes

What is meant by excess supply?

Level:
A-Level, IB
Board:
AQA, Edexcel, OCR, IB, Eduqas, WJEC

Last updated 15 Jul 2023

In economics, excess supply, also known as a surplus, occurs when the quantity supplied of a product or service exceeds the quantity demanded at a given price level. It indicates that there is more supply available in the market than there is effective demand from buyers.

Excess supply can be caused by several factors:

  1. Decrease in Demand: If there is a decrease in consumer demand for a product or service, while the supply remains constant, it can lead to excess supply. This could happen due to changes in consumer preferences, a decrease in real disposable income, or the availability of substitute products.
  2. Increase in Supply: If producers increase their production without a corresponding increase in demand, it can result in excess supply. This can occur due to factors such as technological advancements that enhance production capabilities or increased competition among producers.
  3. Pricing Decisions: If producers set the price of a product too high relative to consumer demand, it can lead to excess supply. Consumers may be unwilling or unable to purchase the product at the given price, resulting in a surplus.

The likely effect of excess supply on market price is a decrease in the price. When there is a surplus, producers find it difficult to sell their entire inventory at the prevailing price.

To clear the excess supply, producers may lower the price in an attempt to stimulate demand and attract more buyers. As the price decreases, consumers may be incentivized to purchase the product, and the quantity demanded may increase, eventually reaching equilibrium where supply and demand are balanced.

The decrease in price serves as a market mechanism to restore equilibrium. It encourages consumers to buy more and discourages producers from supplying excess quantities. Through this price adjustment, the market seeks to eliminate the surplus and bring the quantity supplied and demanded back into balance.

It is important to note that the extent and duration of excess supply and its impact on market price can vary depending on the price elasticity of demand and supply, the time frame considered, and other market-specific factors.

Excess supply is an important concept in economics because it can have a significant impact on market prices. When there is excess supply, the market price will tend to fall. This can have a number of consequences, including:

  • Consumers benefit from lower prices: When the price of a good or service falls, consumers benefit because they can buy the good or service for a lower price.
  • Producers may suffer losses: When the price of a good or service falls, producers may suffer losses because they are not able to sell their goods or services for as much money.
  • The economy may slow down: If there is excess supply in a number of different markets, this can lead to a slowdown in the economy. This is because consumers will have less money to spend, and businesses will have less incentive to invest.

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