Price Elasticity of Demand

The price elasticity of demand (PED) is a measure of the responsiveness of the quantity demanded of a good or service to a change in its price. It is calculated as the percentage change in quantity demanded divided by the percentage change in price.

PED is a key concept in microeconomics, as it helps to explain how changes in price affect consumer behavior. A good with a high PED is one whose quantity demanded changes significantly in response to a change in price. For example, if the price of gasoline increases by 10%, the quantity demanded of gasoline may decrease by 20%. This means that gasoline has a high PED.

A good with a low PED is one whose quantity demanded changes little in response to a change in price. For example, if the price of salt increases by 10%, the quantity demanded of salt may only decrease by 1%. This means that salt has a low PED.

The PED of a good is important because it can help businesses to determine how changes in price will affect their sales. For example, a business that sells a good with a high PED may be more likely to increase its price, as it knows that this will not lead to a significant decrease in sales. Conversely, a business that sells a good with a low PED may be more likely to decrease its price, as it knows that this will lead to a significant increase in sales.

The PED of a good can also be used to predict the impact of government policies on the market for that good. For example, a government policy that increases the price of a good with a high PED is likely to lead to a decrease in the quantity demanded of that good. Conversely, a government policy that decreases the price of a good with a low PED is likely to lead to an increase in the quantity demanded of that good.