1. Price Ceilings, Price Floors, and Excise Taxes
Governments & markets

2. A price above which it is illegal to charge. Binding price ceiling:
A price ceiling set below the equilibrium price.
Governments & markets

3. A binding price ceilingS
Price can't rise above this level, so there's always excess demand.
p(max) D q
Governments & markets

4. Price can't fall below this level so there's always a surplus.
A binding price floor p S
p(min)
Price can't fall below this level so there's always a surplus. D q
Governments & markets

5. Binding price ceilings lead to shortages (excess demand).
Binding price floors lead to surpluses (excess supply).
Governments & markets

6. Minimum agricultural prices
Additional examples:
Rent control
Minimum wage laws
Minimum agricultural prices
Governments & markets

7. AN IMPORTANT TAX PROBLEM
Suppose the market for cigarettes is in equilibrium.
Suppose the State of Michigan, in its wisdom, decides to impose a tax of $1 per pack on the sale of cigarettes.
How does the tax affect the market for cigarettes?
Governments & markets

8. The tax will raise the supply curve by the amount of the tax per unit.
This kind of tax can be analyzed as if it were an input price increase. The tax is similar to having to pay a higher price for some input (government services?).
The tax will raise the supply curve by the amount of the tax per unit.
Governments & markets

9. The tax raises the supply curve by the amount of the tax per unit
S + tax
price S
This distance is exactly $1. pE D QE Q
CIGARETTE MARKET
Governments & markets

10. The reason the supply curve shifts up by exactly the amount of the tax is that price would have to rise by the full amount of the tax to induce cigarette suppliers to supply the amount they supplied before the tax.
Governments & markets

11. But price will rise by less than the amount of the tax, as the following diagram shows.
Go to hidden slide
Governments & markets

12. The state’s tax revenue is $1 times the number of units sold.
total tax collections
S + tax P S
pE’ D QE Q
QE’
CIGARETTE MARKET
Governments & markets

13. Tax Burden
The tax burden on consumers is the part of the tax paid by consumers in terms of higher prices.
The tax burden on sellers is the part of the tax paid by firms in terms of lower receipts.
Governments & markets

14. Who pays the tax on cigarettes?
S+Tax
Tax per unit S
$3.60
$3.00
$2.60 D Q
Go to hidden slide
Governments & markets

15. Tax burden on each is determined by the elasticities of supply and demand.
Governments & markets

16. Given the demand curve, more elastic (flatter) supply means greater tax burden for consumers.
Given the supply curve, more elastic (flatter) demand means greater tax burden for sellers.
[Hint: Don't try to memorize these statements. Instead, make sure you can figure out each case.]
Governments & markets

17. Elasticity also determines the state's tax revenue.
For example:
1) The more inelastic is the demand curve, the greater will be the state’s tax revenue.
2) The more inelastic is the supply curve, the greater will be the state’s tax revenue.
Governments & markets

18. When demand is more elastic: Price rises less.
The next (hidden) slide shows these principles for different elasticities of demand.
When demand is more elastic:
Price rises less.
There's relatively more burden on sellers.
The state takes in less revenue.
Go to hidden slide
Governments & markets