Supply function: P = 2 + 0.5QS
Where QD is the quantity demanded, QS is the quantity supplied and P is the unit price of rice.
(8 marks)
(12 marks)
Demand: P = 6 - 0.5Q
Supply: P = 2 + 0.5Q
a) At equilibrium, demand equals supply
6 - 0.5Q = 2 + 0.5Q
Q = 4
At this quantity, P = 4
Consumer surplus in this market is area of portion A + B + C whose sum is (1/2) * (4 - 0) * (6 - 4) = 4
Producer surplus in this market is area of portion D + E + F whose sum is (1/2) * (4 - 0) * (4 - 2) = 4
b) Under price floor of $5.5
Consumer surplus in this market is area of portion A whose sum is (1/2) * (1 - 0) * (6 - 5.5) = 0.25
Producer surplus in this market is area of portion D + B + F whose sum is (1/2) * (1 - 0) * (2.5 - 2) + (5.5 - 2.5) * (1 - 0) = 3.25
Deadweight loss under price floor is sum of portion C + E whose sum is (1/2) * (4 - 1) * (5.5 - 2.5) = 4.5
Farmers as a producer are not better off as producer surplus falls from 4 to 3.25.
The market for rice in a country has the following demand and supply functions: Demand function: ...
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