Question

2. (30 Marks) Suppose a market is characterized by the following supply and demand equations: QD=1,000-5P...

2. Suppose a market is characterized by the following supply and demand equations:

QD=1,000-5P
QS=-500+10P

  1. A) Determine equilibrium price and quantity.

  2. B) Suppose that the government taxes production such that for every unit produced, sellers must pay the government $10. Determine the new equilibrium price(s) and quantity.

  3. C) Suppose that instead of taxes, the government imposes a price floor such that the minimum amount the good can be sold for is $150. Determine the new equilibrium price and quantity.

  4. D) Determine producer surplus, consumer surplus, and total surplus under parts A), B) and C). Are producers or consumers better off under either form of government intervention? How do you know?

Homework Answers

Answer #1

a. At Equilibrium, Qd=Qs

1000-5P= -500+10P

P*= 1500/15=$100

Q*= -500+10*100= 500

b. Tax=$10

New quantity supplied= Qs'=-500+10(P-10)= -600+10P

-600+10P=1000-5P

P**= $466.7

Q**= 106.7

C. Price floor=$150

So, Price=$150

Quantity=1000-5*150= 250

D. Part A:

CS=0.5(200-100)500=$25000

PS=0.5(100-50)500= $12500

TS=$37500

Part B:

CS=0.5(200-106.7)(466.7)=$21771.5

PS=0.5(96.7-50)(466.7)=$10897.4

TS=$32668.9

Part C:

CS=0.5(200-150)250=$6250

PS=(150-75)(250)+(0.5(75-50)250)=$21875

TS=$28125

e. consumers are better off under Taxes.

Producers are better off under price floor.

We know this by comparing consumer and producer surplus

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