Q2) A monopolist has variable costs of VC = q2 and faces a demand curve of P = 24 – q, where P is price and q the quantity sold. If the monopolist sets a single price, what is the resulting loss in the gains from trade?
a) $8
b) $6
c) $12
d) $4
e) None of the above
Ans ) Option b
A monopolist produces where ,
Marginal revenue = marginal cost
Marginal revenue = d(total revenue)/d(q)
total revenue = price × quantity = q(24 - q)
Total revenue = 24q - q2
Marginal revenue = 24 - 2q
Marginal cost = d(total cost)/d(q)
Marginal cost = 2q
Put, marginal revenue = marginal cost
24 - 2q = 2q
24 = 4q
q = 24/4
quantity = q = 6
Price = 24 - q = 24 - 6 = $18
Competitive equilibrium
In competitive equilibrium,
Price = marginal cost
24 - q = 2q
24 = 3q
q = 24/3
quantity = q = 8
Price = 24 - 8 = 16
In the below diagram, the area 'a' and 'b' represent the deadweight loss when the monopolist operates in an economy.
It can be calculated as follows:
[(1/2)×(2)×(18-16)] + [(1/2)×(2)×(16-12)]
= 2 + 4
= $6
Q2) A monopolist has variable costs of VC = q2 and faces a demand curve of P = 24 – q, where P is price and q the quantity sold. If the monopolist sets a single price, what is the resulting loss in th...
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