Question
Consider the market for a (fictional) brand of car, Carro. (We will analyse this market in isolation.) Carros are produced by a single producer, Carro
Consider the market for a (fictional) brand of car, Carro. (We will analyse this market
in isolation.) Carros are produced by a single producer, Carro Motors. The production
technology exhibits constant returns to scale, at a marginal cost of cM = 2. There are
no fixed costs.
Carro Motors sells all the cars it produces to two dealers, Carro East and Carro West,
who then sell the cars to consumers. The price that Carro Motors charges the dealers
is pM. Both dealers pay the same price. Each dealer, however, is allowed to charge a
different price to consumers.
Both dealers sell only Carros, and neither has any costs other than the cost of buying
the cars. Because Carro East and Carro West sell the same physical product, customers
regard buying from the dealers as substitute. However, because the dealers
are located in different areas, the substitutes are imperfect. Therefore, the dealers face
the following demand functions:
qE=8-3pE+pW;
qW=8-3pW+pE;
where pE and pW are the prices of Carros at Carro East and Carro West, respectively,
and qE and qW are the quantities sold at the two dealerships.
The dealers compete by simultaneously setting prices.
Please answer the following questions. Make sure that you explain all the steps of your
analysis and that you define any new notation that you use. You may assume that cars
are infinitely divisible (this can be justified by interpreting the quantities as shipments
containing many cars).
(a)Compute the equilibrium prices, quantities, and profits when all three firms are
independent.
(b) Suppose all three firms merge, forming a single entity, Carro Cars, which manufactures
the cars and sells them in both geographical areas (let qE and qW now
be the quantities sold in the areas formerly served by Carro East and Carro West,
respectively). Compute the new equilibrium prices, quantities, and profits.
(c) Did the merger increase or decrease total surplus? (Note: you do not need to
compute total surplus explicitly)
(d) Now suppose that the final retail market becomes perfectly competitive. Would
there still be a benefit to vertical integration?
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