Tax Incidence: How do the effects of a tax differ in the short run between markets with different elasticities of supply? Consider two hypothetical markets. In both cases, the demand function is QD = 1000 - P The two supply functions are QS1 = P - 200 and QS2 = 4P - 2000 a. Solve for equilibrium price and quantity for both cases and show that the equilibrium values are the same in these two cases (for QS1 and QD and for QS2 and QD). b. Plot the demand and supply curves (with P on the vertical axis and Q on the horizontal axis) for the two markets on the same graph. c. Now suppose a tax is imposed in both markets, equal to $60 per unit purchased. Model this as a shift in the demand curve (so that QD now depends on P, the net price paid to the firm, plus the tax). Illustrate the new demand curve on your graph (label everything clearly). Derive the new equilibrium price (the net price received by the firm) and quantity for each of the two cases. In which case is the producer’s share of the tax burden greater?
QD = 1000 - P.
QS1 = P - 200
QS2 = 4P - 2000
a. Qd=Qs1
1000-P=P-200
1200=2P
P1=600
Q1=1000-600=400
Qd=Qs2
1000 -P= 4P-2000
3000= 5P
P2= 600
Q2= 1000-600=400
B.
C. Market 1:
Tax on Consumer
Qd new= 1000-(P+60)= 940-P
Qs1= P-200
Qd new= Qs1
940-P=P-200
1140=2P
New Equilibrium price received by sellers P*=$570
New Equilibrium Price Paid by consumers= 570+60= $630
Quantity=570-200=370
Qd new= Qs2
940-P=4P-2000
2940=5P
New Equilibrium price received by sellers P*=$588
New Equilibrium Price Paid by consumers= 588+60= $648
Quantity=940-588=352
Market 1
Producer share= 600-570=$30
Market 2
Producer share= 600-588= $12
In market A producer share is more.
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