4 the economics of the public sector. copyright © 2006 thomson learning 10 externalities

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4 THE ECONOMICS OF THE PUBLIC SECTOR

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Page 1: 4 THE ECONOMICS OF THE PUBLIC SECTOR. Copyright © 2006 Thomson Learning 10 Externalities

4

THE ECONOMICS OF THE PUBLIC SECTOR

Page 2: 4 THE ECONOMICS OF THE PUBLIC SECTOR. Copyright © 2006 Thomson Learning 10 Externalities

Copyright © 2006 Thomson Learning

1010Externalities

Page 3: 4 THE ECONOMICS OF THE PUBLIC SECTOR. Copyright © 2006 Thomson Learning 10 Externalities

Figure 1 The Market for Aluminium

Copyright © 2004 South-Western

Quantity ofAluminum

0

Price ofAluminum

Equilibrium

Demand(private value)

Supply(private cost)

QMARKET

Page 4: 4 THE ECONOMICS OF THE PUBLIC SECTOR. Copyright © 2006 Thomson Learning 10 Externalities

Figure 2 Pollution and the Social Optimum

Copyright © 2004 South-Western

Equilibrium

Quantity ofAluminum

0

Price ofAluminum

Demand(private value)

Supply(private cost)

Socialcost

QOPTIMUM

Optimum

Cost ofpollution

QMARKET

Page 5: 4 THE ECONOMICS OF THE PUBLIC SECTOR. Copyright © 2006 Thomson Learning 10 Externalities

Figure 3 Education and the Social Optimum

Copyright © 2004 South-Western

Quantity ofEducation

0

Price ofEducation

Demand(private value)

Socialvalue

Supply(private cost)

QMARKET QOPTIMUM

Page 6: 4 THE ECONOMICS OF THE PUBLIC SECTOR. Copyright © 2006 Thomson Learning 10 Externalities

Figure 4 The Equivalence of Pigovian Taxes and Pollution Permits

Copyright © 2004 South-Western

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

Page 7: 4 THE ECONOMICS OF THE PUBLIC SECTOR. Copyright © 2006 Thomson Learning 10 Externalities

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