Suppose a movie theater determines that the elasticity of demand for movie tickets is -2.0 for senior citizens and –1.5 for adults under age 65. Use the Lerner index to determine the ratio of prices between adults and seniors. In percentage terms, how big a price premium should be charged to the group that pays the higher price?
A. The movie theater should charge adults 1.33 times the amount (33% more) they charge to seniors.
B. The movie theater should charge adults 1.5 times the amount (50% more) they charge to seniors.
C. The movie theater should charge seniors 2 times the amount (200% more) they charge to adults.
D. The movie theater should charge adults 3 times the amount (300% more) they charge to seniors.
Option A is the correct answer.
Explained in picture attached.
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