How do you calculate the cross elasticity of demand between two products?
John Hall
Updated on February 15, 2026
Also called cross-price elasticity of demand, this measurement is calculated by taking the percentage change in the quantity demanded of one good and dividing it by the percentage change in the price of the other good.
When two goods are complements to each other the cross price elasticity will?
If the goods are close substitutes, the cross-price elasticity will be positive and large; if not close substitutes, the cross-price elasticity will be positive and small. When two goods are complements, the cross-price elasticity will be negative.
How do you determine if goods are substitutes or complements?
We determine whether goods are complements or substitutes based on cross price elasticity – if the cross price elasticity is positive the goods are substitutes, and if the cross price elasticity are negative the goods are complements.
What is cross price elasticity formula?
Cross-Price Elasticity Formula Qx = Average quantity between the previous quantity and the changed quantity, calculated as (new quantityX + previous quantityX) / 2. Py = Average price between the previous price and changed price, calculated as (new pricey + previous pricey) / 2.
What does negative cross-price elasticity mean?
complements
A negative cross elasticity denotes two products that are complements, while a positive cross elasticity denotes two products are substitutes. If products A and B are complements, an increase in the price of B leads to a decrease in the quantity demanded for A, as A is used in conjunction with B.
When two goods are the cross price elasticity of demand is negative?
When two goods have near zero cross elasticity they are called?
Independent Goods. When two goods have near-zero cross elasticity. Zero.
How do you know if a product is complement?
A complementary good or service is an item used in conjunction with another good or service. Usually, the complementary good has little to no value when consumed alone, but when combined with another good or service, it adds to the overall value of the offering.
What does it mean when cross price elasticity is 1?
Unitary income elasticity of demand (YED=1): An increase in income is accompanied by a proportional increase in quantity demanded. Low income elasticity of demand (YED<1): An increase in income is accompanied by less than a proportional increase in quantity demanded. This is characteristic of a necessary good.
What are the 4 types of elasticity?
Four types of elasticity are demand elasticity, income elasticity, cross elasticity, and price elasticity.
What does a cross price elasticity of 0.5 mean?
Just divide the percentage change in the dependent variable and the percentage change in the independent one. If the latter increases by 3% and the former by 1.5%, this means that elasticity is 0.5. Elasticity of -1 means that the two variables goes in opposite directions but in the same proportion.
What does it mean if the cross price elasticity of demand is negative?
What does a negative cross-price elasticity mean?
When two goods are complements if the price of good A increases?
If two products are complements, an increase in demand for one is accompanied by an increase in the quantity demanded of the other. For example, an increase in demand for cars will lead to an increase in demand for fuel. If the price of the complement falls, the quantity demanded of the other good will increase.
What is an example of a complement?
A complement will provide greater detail about the subject. Example: The soup tasted good. In this case, “the soup” is the subject of the sentence. “Tasted” is a linking verb to the adjective “good,” which describes more about the soup.
What does it mean when cross price elasticity is 0?
Independent goods have a cross-price elasticity of zero: as the price of one good increases, the demand for the second good is unchanged.
When the cross elasticity of demand between two goods equals the two goods are substitutes?
A positive cross-price elasticity value indicates that the two goods are substitutes. For substitute goods, as the price of one good rises, the demand for the substitute good increases.
When two goods are complements to each other the cross-price elasticity will?
What is cross elasticity what indicates that the cross elasticity of A and B are complements?
A negative cross elasticity denotes two products that are complements, while a positive cross elasticity denotes two products are substitutes. If products A and B are complements, an increase in the price of B leads to a decrease in the quantity demanded for A, as A is used in conjunction with B.
What is cross-price elasticity formula?
Definition: Cross elasticity (Exy) tells us the relationship between two products. it measures the sensitivity of quantity demand change of product X to a change in the price of product Y. Percentage change in Py = (P1-P2) / [1/2 (P1 + P2)] where P1 = initial Price of Y, and P2 = New Price of Y.
What is the formula of elasticity of supply?
The price elasticity of supply = % change in quantity supplied / % change in price. When calculating the price elasticity of supply, economists determine whether the quantity supplied of a good is elastic or inelastic. PES > 1: Supply is elastic.
How do you know if two goods are substitutes or complements?
What does negative price elasticity mean?
If we are analyzing a market demand curve, then the price elasticity of demand tells us how the quantity demanded in the market changes when the price changes. If the income elasticity of demand is negative, it is an inferior good. If the income elasticity of demand is positive, it is a normal good.
When is the cross elasticity of demand negative?
When the cross elasticity of demand for product A relative to a change in the price of product B is negative, it means that the quantity demanded of A has decreased relative to a rise in the price of product B.
What is the cross elasticity of substitute goods?
Substitute goods will have a positive cross-elasticity of demand. Complements will have a negative cross elasticity of demand Unrelated goods will have a cross-elasticity of demand of zero. The price of apples has no effect on demand for Apple computers. Weak substitutes like tea and coffee will have a low cross elasticity of demand.
What is the cross price elasticity of complements?
Complements will always have a negative Cross Price Elasticity or less than zero. These are goods that show no relationship in consumer consumption patterns. Price changes in one product don’t affect the quantity consumed of the other product.
Which is the most important concept of cross elasticity?
The most important concept to understand in terms of cross elasticity is the type of related product. The cross elasticity of demand depends on whether the related product is a substitute product or a complementary product. As mentioned earlier, cross elasticity measures the demand responsiveness in relation to related products.
