ECON 101 Lecture Notes - Lecture 17: Normal Good
Document Summary
Demand curves shift because of changes in income and change of prices of related goods. We can best measure how demand of a good is affected by prices of related goods using cross- price elasticity of demand. Can measure how demand is affected by changes in income using the income elasticity of demand. Cross-price elasticity of demand: measures the effect of the change in one good"s price on the quantity demanded of the other good. Ratio of percent change in the quantity demanded of one good to the percent change in the price of the other. % change in quantity demanded of a / % change in price of b. When two goods are substitutes, cross-price elasticity of demand is positive. Positive change in price (rise in price) of one good, raises the demand for its substitute. If close substitutes the cross-price elasticity will be large and positive: if not, positive and small.