Consider a market for books. Demand is given by QD=120-P. Supply is given by Qs=5P. The equilibrium price in this market is 20 The consumer surplus is 5000 The producer surplus is 1000 The total surplus is 6000 Suppose now the government introduces a $6 sales tax on each book. The equilibrium price the producer receives (the price not including the tax) is now 19 The consumer surplus is now 4512.5 v. The producer surplus is now 902.5 The government's revenue is 570 The deadweight loss is 15

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Chapter1: Making Economics Decisions
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Consider a market for books.
Demand is given by QD=120-P.
Supply is given by Qs=5P.
The equilibrium price in this market is 20
The consumer surplus is 5000
The producer surplus is 1000
The total surplus is
6000
Suppose now the government introduces a $6 sales tax on each book.
The equilibrium price the producer receives (the price not including the tax) is now
19
The consumer surplus is now 4512.5 v.
The producer surplus is now 902.5
The government's revenue is 570
The deadweight loss is 15
Consider a perfectly competitive market with 1000 firms. The cost function of each firm is C(q) = 0.025g² + 200. The total
demand in the market is given by Qp=60,000-10,000P.
The supply curve for each firm is given by 20
The competitive price in this market is 2
v. HINT: you need to first find the total market supply. Each firm is producing
40
v units,
The competitive market is in long run equilibrium: 4.5
Consider a market for rides (as in the market that Uber operates).
Demand for rides is given by QD=120-2P.
Supply of rides by drivers is given by Qs=10P.
The equilibrium price in this market is 100
The consumer surplus is 2500 v
The producer surplus is 500
v. Note that producer surplus is calculated in the standard way. Some of it goes to drivers and some
to Uber.
The total surplus is 3000 v
Suppose now that Uber sets the price of a ride at $12.
The quantity of rides in the market is now 96
The consumer surplus is now 2304 v
The producer surplus is now 691.2 v (still calculated in the standard way).
Assuming Uber's revenue is 20% of ride revenue, their revenue at the equilibrium price is 200
v and at a price of $12 is
230.4 v.
Transcribed Image Text:Consider a market for books. Demand is given by QD=120-P. Supply is given by Qs=5P. The equilibrium price in this market is 20 The consumer surplus is 5000 The producer surplus is 1000 The total surplus is 6000 Suppose now the government introduces a $6 sales tax on each book. The equilibrium price the producer receives (the price not including the tax) is now 19 The consumer surplus is now 4512.5 v. The producer surplus is now 902.5 The government's revenue is 570 The deadweight loss is 15 Consider a perfectly competitive market with 1000 firms. The cost function of each firm is C(q) = 0.025g² + 200. The total demand in the market is given by Qp=60,000-10,000P. The supply curve for each firm is given by 20 The competitive price in this market is 2 v. HINT: you need to first find the total market supply. Each firm is producing 40 v units, The competitive market is in long run equilibrium: 4.5 Consider a market for rides (as in the market that Uber operates). Demand for rides is given by QD=120-2P. Supply of rides by drivers is given by Qs=10P. The equilibrium price in this market is 100 The consumer surplus is 2500 v The producer surplus is 500 v. Note that producer surplus is calculated in the standard way. Some of it goes to drivers and some to Uber. The total surplus is 3000 v Suppose now that Uber sets the price of a ride at $12. The quantity of rides in the market is now 96 The consumer surplus is now 2304 v The producer surplus is now 691.2 v (still calculated in the standard way). Assuming Uber's revenue is 20% of ride revenue, their revenue at the equilibrium price is 200 v and at a price of $12 is 230.4 v.
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