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When the price elasticity of demand is unit (or unitary) elastic (E d = −1), the percentage change in quantity demanded is equal to that in price, so a change in price will not affect total revenue. When the price elasticity of demand is relatively elastic (−∞ < E d < −1), the percentage change in quantity demanded is greater than that ...
In economics, elasticity measures the responsiveness of one economic variable to a change in another. [1] 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%.
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. [15]
If the elasticity of demand is greater than 1, it is a luxury good or a superior good. A zero income elasticity of demand means that an increase in income does not change the quantity demanded of the good. Income elasticity of demand can be used as an indicator of future consumption patterns and as a guide to firms' investment decisions.
The price elasticity of demand is a measure of the sensitivity of the quantity variable, Q, to changes in the price variable, P. It shows the percent by which the quantity demanded will change as a result of a given percentage change in the price. Thus, a demand elasticity of -2 says that the quantity demanded will fall 2% if the price rises 1%.
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. There does exist a family of demand curves with constant elasticity for all prices.
Cross-price elasticity helps us understand the degree of substitutability of the two products. An increase in the price of a good will increase demand for its substitutes, while a decrease in the price of a good will decrease demand for its substitutes, see Figure 2. [4] Figure 2: Graphical example of substitute goods
Cross elasticity of demand of product B with respect to product A (η BA): = / / = > implies two goods are substitutes.Consumers purchase more B when the price of A increases. Example: the cross elasticity of demand of butter with respect to margarine is 0.81, so 1% increase in the price of margarine will increase the demand for butter by 0.81