The price elasticity of demand

 Definition

The price elasticity of demand np) is sometimes referred to as the own price elasticity of demand. This is to distinguish the responsiveness of the quantity demanded of a good to its own price rather than to the price of another good.

Price elasticity of demand (PED) is an economic concept that measures how the quantity demanded of a good or service changes in response to a change in its price. It is a crucial concept in understanding consumer behaviour and how sensitive demand is to price changes.

Key Points:

Definition:

Price elasticity of demand is defined as the percentage change in the quantity demanded divided by the percentage change in price.

The formula is:

PED

=

%

 Change in Quantity Demanded

%

 Change in Price

PED= 

% Change in Price

% Change in Quantity Demanded


Elastic vs. Inelastic Demand:

Elastic Demand (PED > 1): When the percentage change in quantity demanded is greater than the percentage change in price. This means that consumers are highly responsive to price changes. For example, if a small decrease in the price of a luxury item leads to a large increase in quantity demanded, the demand is considered elastic.


Inelastic Demand (PED < 1): When the percentage change in quantity demanded is less than the percentage change in price. This indicates that consumers are less responsive to price changes. For example, if the price of gasoline increases, people might reduce their consumption slightly, but overall demand remains relatively stable because it's a necessity.

Unitary Elasticity (PED = 1): When the percentage change in quantity demanded is exactly equal to the percentage change in price. In this case, the total revenue remains unchanged when the price changes.

Determinants of Price Elasticity:

Availability of Substitutes: If there are close substitutes available, demand tends to be more elastic because consumers can easily switch to alternative products if the price increases.

Necessity vs. Luxury: Necessities tend to have inelastic demand because consumers need them regardless of price changes. Luxuries, on the other hand, often have elastic demand.

Time Horizon: In the short run, demand may be inelastic because consumers need time to adjust their behavior. Over the long run, demand may become more elastic as consumers find alternatives or adjust their consumption habits.



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