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The Costs of Taxation
1.
Copyright©2004 South-Western 88Application: The Costs
of Taxation
2.
Copyright © 2004
South-Western/Thomson Learning Application: The Costs of Taxation • Welfare economicsWelfare economics is the study of how the allocation of resources affects economic well- being. • Buyers and sellers receive benefits from taking part in the market. • The equilibrium in a market maximizes the total welfare of buyers and sellers.
3.
Copyright © 2004
South-Western/Thomson Learning THE DEADWEIGHT LOSS OF TAXATION • How do taxes affect the economic well-being of market participants?
4.
Copyright © 2004
South-Western/Thomson Learning THE DEADWEIGHT LOSS OF TAXATION • It does not matter whether a tax on a good is levied on buyers or sellers of the good . . . the price paid by buyers rises, and the price received by sellers falls.
5.
Figure 1 The
Effects of a Tax Copyright © 2004 South-Western Size of tax Quantity0 Price Price buyers pay Price sellers receive Demand Supply Price without tax Quantity without tax Quantity with tax
6.
Copyright © 2004
South-Western/Thomson Learning How a Tax Affects Market Participants • A tax places a wedge between the price buyers pay and the price sellers receive. • Because of this tax wedge, the quantity sold falls below the level that would be sold without a tax. • The size of the market for that good shrinks.
7.
Copyright © 2004
South-Western/Thomson Learning How a Tax Affects Market Participants • Tax Revenue • T = the size of the tax • Q = the quantity of the good sold TT ×× QQ = the government’s tax revenue= the government’s tax revenue
8.
Figure 2 Tax
Revenue Copyright © 2004 South-Western Tax revenue (T × Q) Size of tax (T) Quantity sold (Q) Quantity0 Price Demand Supply Quantity without tax Quantity with tax Price buyers pay Price sellers receive
9.
Figure 3 How
a Tax Effects Welfare Copyright © 2004 South-Western A F B D C E Quantity0 Price Demand Supply = PB Q2 = PS Price buyers pay Price sellers receive = P1 Q1 Price without tax
10.
Copyright © 2004
South-Western/Thomson Learning How a Tax Affects Market Participants • Changes in Welfare • A deadweight loss is the fall in total surplus that results from a market distortion, such as a tax.
11.
Copyright © 2004
South-Western/Thomson Learning How a Tax Affects Welfare
12.
Copyright © 2004
South-Western/Thomson Learning How a Tax Affects Market Participants • The change in total welfare includes: • The change in consumer surplus, • The change in producer surplus, and • The change in tax revenue. • The losses to buyers and sellers exceed the revenue raised by the government. • This fall in total surplus is called the deadweight loss.
13.
Copyright © 2004
South-Western/Thomson Learning Deadweight Losses and the Gains from Trade • Taxes cause deadweight losses because they prevent buyers and sellers from realizing some of the gains from trade.
14.
Figure 4 The
Deadweight Loss Copyright © 2004 South-Western Cost to sellersValue to buyers Size of tax Quantity0 Price Demand SupplyLost gains from trade Reduction in quantity due to the tax Price without tax Q1 PB Q2 PS
15.
Copyright © 2004
South-Western/Thomson Learning DETERMINANTS OF THE DEADWEIGHT LOSS • What determines whether the deadweight loss from a tax is large or small? • The magnitude of the deadweight loss depends on how much the quantity supplied and quantity demanded respond to changes in the price. • That, in turn, depends on the price elasticitiesprice elasticities of supply and demand.
16.
Figure 5 Tax
Distortions and Elasticities Copyright © 2004 South-Western (a) Inelastic Supply Price 0 Quantity Demand Supply Size of tax When supply is relatively inelastic, the deadweight loss of a tax is small.
17.
Figure 5 Tax
Distortions and Elasticities Copyright © 2004 South-Western (b) Elastic Supply Price 0 Quantity Demand SupplySize of tax When supply is relatively elastic, the deadweight loss of a tax is large.
18.
Figure 5 Tax
Distortions and Elasticities Copyright © 2004 South-Western Demand Supply (c) Inelastic Demand Price 0 Quantity Size of tax When demand is relatively inelastic, the deadweight loss of a tax is small.
19.
Figure 5 Tax
Distortions and Elasticities Copyright © 2004 South-Western (d) Elastic Demand Price 0 Quantity Size of tax Demand Supply When demand is relatively elastic, the deadweight loss of a tax is large.
20.
Copyright © 2004
South-Western/Thomson Learning DETERMINANTS OF THE DEADWEIGHT LOSS • The greater the elasticities of demand and supply: • the larger will be the decline in equilibrium quantity and, • the greater the deadweight loss of a tax.
21.
Copyright © 2004
South-Western/Thomson Learning DEADWEIGHT LOSS AND TAX REVENUE AS TAXES VARY • The Deadweight Loss Debate • Some economists argue that labor taxes are highly distorting and believe that labor supply is more elastic. • Some examples of workers who may respond more to incentives: • Workers who can adjust the number of hours they work • Families with second earners • Elderly who can choose when to retire • Workers in the underground economy (i.e., those engaging in illegal activity)
22.
Copyright © 2004
South-Western/Thomson Learning DEADWEIGHT LOSS AND TAX REVENUE AS TAXES VARY • With each increase in the tax rate, the deadweight loss of the tax rises even more rapidly than the size of the tax.
23.
Figure 6 Deadweight
Loss and Tax Revenue from Three Taxes of Different Sizes Copyright © 2004 South-Western Tax revenue Demand Supply Quantity0 Price Q1 (a) Small Tax Deadweight loss PB Q2 PS
24.
Figure 6 Deadweight
Loss and Tax Revenue from Three Taxes of Different Sizes Copyright © 2004 South-Western Tax revenue Quantity0 Price (b) Medium Tax PB Q2 PS Supply Demand Q1 Deadweight loss
25.
Figure 6 Deadweight
Loss and Tax Revenue from Three Taxes of Different Sizes Copyright © 2004 South-Western Taxrevenue Demand Supply Quantity0 Price Q1 (c) Large Tax PB Q2 PS Deadweight loss
26.
Copyright © 2004
South-Western/Thomson Learning DEADWEIGHT LOSS AND TAX REVENUE AS TAXES VARY • For the small tax, tax revenue is small. • As the size of the tax rises, tax revenue grows. • But as the size of the tax continues to rise, tax revenue falls because the higher tax reduces the size of the market.
27.
Figure 7 How
Deadweight Loss and Tax Revenue Vary with the Size of a Tax Copyright © 2004 South-Western (a) Deadweight Loss Deadweight Loss 0 Tax Size
28.
Figure 7 How
Deadweight Loss and Tax Revenue Vary with the Size of a Tax Copyright © 2004 South-Western (b) Revenue (the Laffer curve) Tax Revenue 0 Tax Size
29.
Copyright © 2004
South-Western/Thomson Learning DEADWEIGHT LOSS AND TAX REVENUE AS TAXES VARY • As the size of a tax increases, its deadweight loss quickly gets larger. • By contrast, tax revenue first rises with the size of a tax, but then, as the tax gets larger, the market shrinks so much that tax revenue starts to fall.
30.
Copyright © 2004
South-Western/Thomson Learning CASE STUDY: The Laffer Curve and Supply- side Economics • The Laffer curve depicts the relationship between tax rates and tax revenue. • Supply-side economics refers to the views of Reagan and Laffer who proposed that a tax cut would induce more people to work and thereby have the potential to increase tax revenues.
31.
Copyright © 2004
South-Western/Thomson Learning Summary • A tax on a good reduces the welfare of buyers and sellers of the good, and the reduction in consumer and producer surplus usually exceeds the revenues raised by the government. • The fall in total surplus—the sum of consumer surplus, producer surplus, and tax revenue — is called the deadweight loss of the tax.
32.
Copyright © 2004
South-Western/Thomson Learning Summary • Taxes have a deadweight loss because they cause buyers to consume less and sellers to produce less. • This change in behavior shrinks the size of the market below the level that maximizes total surplus.
33.
Copyright © 2004
South-Western/Thomson Learning Summary • As a tax grows larger, it distorts incentives more, and its deadweight loss grows larger. • Tax revenue first rises with the size of a tax. • Eventually, however, a larger tax reduces tax revenue because it reduces the size of the market.
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