The firms in a perfectly competitive market for a good create pollution, the costs of which do not enter into the firms' costs. The government decides to impose a domestic Pigovian tax, t, as a way of addressing this problem. Figure 11 shows this scenario. Price P1 P2 P3 MC5 MCp+t MC-S D Q1 Q2 03 Quantity Figure 11: A Pigovian tax on suppliers Based on Figure 11, select the correct answer to match this description: The quantity demanded after the tax is implemented a. Q1 ○ b. Q₂ ○ C. Q3

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Suppose that in a perfectly competitive market, the demand for Frisbees is given by Q=200-2P and the supply by Q=-70+P. Assume also that we are at an off-equilibrium price at $95. What is the deadweight loss at that particular price? 100 75 150

Assume that a price floor of $320 has been implemented and there are no wasteful quality improvements. What are the total gains from trade (total surplus) with a price floor of $320? Hint: enter your answer as a number only with no $ sign Example: if the answer is $10,000, enter 10,000 2,400

18-19. In the competitive market for white sugar, consumer demand is given by P=100-0.050 and suppliers' behaviour is represented by the supply curve of P=1+0.005Q, where P is measured in dollars and Q is measured in kilos per month. Questions 17 through 19 refer to this market. 18. Imagine now that the government imposes a price ceiling of $5.00 per kilo on sugar, and that the ceiling is obeyed by all market participants. In the resulting equilibrium the total number of kilos of sugar exchanged in the market is equal to: A) 2100 G) 800 B) 2000 H) 600 A) $5 G) $70 C) 1900 I) 400 B) $10 H) $80 19. Suppose suppliers obey the price ceiling but consumers sell sugar on a black market. What will the black market price for sugar be? D) 1400 E) 1200 J) None of the above C) $10.50 I) $21 E) $50 F) 1000 D) $40 J) None of the above F) $60

Suppose Home is a small exporter of wheat. At the world price of 100 US dollars per tonne, Home growers export 20 tons of wheat. Now suppose the Home government decides to support its domestic producers with an specific export subsidy of 40 US dollars per tonne. Use Figure 1 to answer the following questions: Figure 1: Supply and Demand for Wheat at Home Home price 140 100 X 10 20 40 50 Supply Demand Quantity (a) Explain why consumer and producer surplus can be used to gauge the change in welfare caused by the export subsidy on individuals and firms.

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In Figure 1, suppose the marginal value for gasoline falls by $6 for every quantity demanded for all gas stations in the market. Next, assume that the government enacts a price ceiling of $2. What is the loss in consumer surplus? A) $6B) $2C) $12D) There is no consumer welfare loss because prices are lower.E) There is not enough information to calculate.

Subsidies lead to overproduction and overconsumption relative to the competitive equilibrium. What is the deadweight loss associated with this? Why is there a deadweight loss? Depict this in your original figure (see attached), or draw a new figure.