4 the economics of the public sector. copyright © 2006 thomson learning 10 externalities
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THE ECONOMICS OF THE PUBLIC SECTOR
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Copyright © 2006 Thomson Learning
1010Externalities
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Figure 1 The Market for Aluminium
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Quantity ofAluminum
0
Price ofAluminum
Equilibrium
Demand(private value)
Supply(private cost)
QMARKET
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Figure 2 Pollution and the Social Optimum
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Equilibrium
Quantity ofAluminum
0
Price ofAluminum
Demand(private value)
Supply(private cost)
Socialcost
QOPTIMUM
Optimum
Cost ofpollution
QMARKET
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Figure 3 Education and the Social Optimum
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Quantity ofEducation
0
Price ofEducation
Demand(private value)
Socialvalue
Supply(private cost)
QMARKET QOPTIMUM
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Figure 4 The Equivalence of Pigovian Taxes and Pollution Permits
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Quantity ofPollution
0
Price ofPollution
Demand forpollution rights
P Pigoviantax
(a) Pigovian Tax
2. . . . which, togetherwith the demand curve,determines the quantityof pollution.
1. A Pigoviantax sets theprice ofpollution . . .
Q
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Figure 4 The Equivalence of Pigovian Taxes and Pollution Permits
Copyright © 2004 South-Western
Quantity ofPollution
0
Demand forpollution rights
Q
Supply ofpollution permits
(b) Pollution Permits
Price ofPollution
2. . . . which, togetherwith the demand curve,determines the priceof pollution.
1. Pollutionpermits setthe quantityof pollution . . .
P