Elizabeth Airlines (EA) flies only one route: ChicagoHonolulu. The demand for
each flight is \(Q=500-P\) EA's cost of running each flight is \(\$ 30,000\) plus
\(\$ 100\) per passenger.
a. What is the profit-maximizing price that EA will charge? How many people
will be on each flight? What is EA's profit for each flight?
b. EA learns that the fixed costs per flight are in fact \(\$ 41,000\) instead
of \(\$ 30,000 .\) Will the airline stay in business for long? Illustrate your
answer using a graph of the demand curve that EA faces, EA's average cost
curve when fixed costs are \(\$ 30,000,\) and \(\mathrm{EA}^{\prime}\) s average
cost curve when fixed costs are \(\$ 41,000\)
c. Wait! EA finds out that two different types of people fly to Honolulu. Type
\(A\) consists of business people with a demand of \(Q_{A}=260-0.4 P\). Type \(B\)
consists of students whose total demand is \(Q_{B}=240-0.6 P\) Because the
students are easy to spot, EA decides to charge them different prices. Graph
each of these demand curves and their horizontal sum. What price does EA
charge the students? What price does it charge other customers? How many of
each type are on each flight?
d. What would EA's profit be for each flight? Would the airline stay in
business? Calculate the consumer surplus of each consumer group. What is the
total consumer surplus?
e. Before EA started price discriminating, how much consumer surplus was the
Type \(A\) demand getting from air travel to Honolulu? Type \(B\) ? Why did total
consumer surplus decline with price discrimination, even though total quantity
sold remained unchanged?