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The above measure of elasticity is sometimes referred to as the own-price elasticity of demand for a good, i.e., the elasticity of demand with respect to the good's own price, in order to distinguish it from the elasticity of demand for that good with respect to the change in the price of some other good, i.e., an independent, complementary, or ...
For example, if the price elasticity of the demand of a good is −2, then a 10% increase in price will cause the quantity demanded to fall by 20%. Elasticity in economics provides an understanding of changes in the behavior of the buyers and sellers with price changes.
At one point on a linear demand curve, demand is unitary elastic: an elasticity of one. For higher prices, the elasticity is greater than 1 in magnitude: demand is said to be elastic because percentage quantity changes are bigger than price changes.
The price elasticity of supply (PES or E s) is commonly known as “a measure used in economics to show the responsiveness, or elasticity, of the quantity supplied of a good or service to a change in its price.” Price elasticity of supply, in application, is the percentage change of the quantity supplied resulting from a 1% change in price.
The Cross elasticity of demand, also commonly referred to as the Cross-price elasticity of demand, allows companies to establish competitive prices against substitute goods and complementary goods. The metric figure produced by the equation thus determines the strength of both the relationship and competition between the two goods.
For examples of elasticities of particular goods, see the article section, "Selected price elasticities". The elasticity of demand usually will vary depending on the price. If the demand curve is linear, demand is inelastic at high prices and elastic at low prices, with unitary elasticity somewhere in between.
A positive income elasticity of demand is associated with normal goods; an increase in income will lead to a rise in quantity demanded. If income elasticity of demand of a commodity is less than 1, it is a necessity good. If the elasticity of demand is greater than 1, it is a luxury good or a superior good.
Examples: Product A currently sells for $10. The seller decides to increase the price to $15, but finds that he ends up making less money. This is because he is selling fewer of the product due to the increased price, and his total revenue has fallen. The demand for this product must be elastic. Product A currently sells for $10.