Lecture Principles of economics - Chapter 6: Supply, demand, and government policies

In this chapter you will examine the effects of government policies that place a ceiling on prices, examine the effects of government policies that put a floor under prices, consider how a tax on a good affects the price of the good and the quantity sold, learn that taxes levied on buyers and taxes levied on sellers are equivalent.

Supply, Demand, and Government Policies Copyright © 2004 South-Western Supply, Demand, and Government Policies • In a free, unregulated market system, market  forces establish equilibrium prices and  exchange quantities • Whileequilibriumconditionsmaybeefficient, itmaybetruethatnoteveryoneissatisfied. Oneoftherolesofeconomistsistousetheir theoriestoassistinthedevelopmentofpolicies Copyright â 2004 South-Western/Thomson Learning CONTROLS ON PRICES • Are usually enacted when policymakers believe  the market price is unfair to buyers or sellers.   • Result in government­created price ceilings and  floors.  Copyright © 2004 South-Western/Thomson Learning CONTROLS ON PRICES • Price Ceiling  • Alegalmaximumonthepriceatwhichagoodcan besold. PriceFloor Alegalminimumonthepriceatwhichagoodcan besold Copyright â 2004 South-Western/Thomson Learning How Price Ceilings Affect Market Outcomes • Two outcomes are possible when the  governmentimposesapriceceiling: Thepriceceilingisnotbindingifsetabovethe equilibriumprice. Thepriceceilingisbindingifsetbelowthe equilibriumprice,leadingtoashortage. Copyright â 2004 South-Western/Thomson Learning Figure A Market with a Price Ceiling (a) A Price Ceiling That Is Not Binding Price of Ice-Cream Cone Supply $4 Price ceiling Equilibrium price Demand 100 Equilibrium quantity Quantity of Ice-Cream Cones Figure A Market with a Price Ceiling (b) A Price Ceiling That Is Binding Price of Ice-Cream Cone Supply Equilibrium price $3 Price ceiling Shortage Demand 75 125 Quantity supplied Quantity demanded Quantity of Ice-Cream Cones Copyright©2003 Southwestern/Thomson Learning How Price Ceilings Affect Market Outcomes • Effects of Price Ceilings  • A binding price ceiling creates •  shortages because QD > QS • Example:  Gasoline shortage of the 1970s •  nonprice rationing • Examples:  Long lines, discrimination by sellers Copyright © 2004 South-Western/Thomson Learning CASE STUDY: Lines at the Gas Pump • In 1973, OPEC raised the price of crude  oil in world markets. Crude oil is the  major input in gasoline, so the higher oil  prices reduced the supply of gasoline • What was responsible for the long gas  lines? • Economists blame government  regulations that limited the price oil  companies could charge for  gasoline Copyright © 2004 South-Western/Thomson Learning Figure The Market for Gasoline with a Price Ceiling (a) The Price Ceiling on Gasoline Is Not Binding Price of Gasoline Supply,S1 Initially, the price ceiling is not binding Price ceiling P1 Demand Q1 Quantity of Gasoline Copyrightâ2003 Southwestern/Thomson Learning TAXES Governmentslevytaxestoraiserevenuefor publicprojects. Copyright â 2004 South-Western/Thomson Learning How Taxes on Buyers (and Sellers) Affect Market Outcomes • Taxes discourage market activity • When a good is taxed, the  quantity sold is smaller.  • Buyers and sellers  share  the tax burden Copyright â 2004 South-Western/Thomson Learning Elasticity and Tax Incidence Tax incidence is the manner in which the  burden of a tax is shared among participants in  a market Copyright © 2004 South-Western/Thomson Learning Elasticity and Tax Incidence • Tax incidence is the study of who bears the  burden of a tax.  • Taxes result in a change in market equilibrium • Buyers pay more and sellers receive less,  regardless of whom the tax is levied on.  Copyright © 2004 South-Western/Thomson Learning Figure A Tax on Buyers Price of Ice-Cream Price Cone buyers pay $3.30 Price 3.00 2.80 without tax Price sellers receive Supply, S1 Equilibrium without tax Tax ($0.50) A tax on buyers shifts the demand curve downward by the size of the tax ($0.50) Equilibrium with tax D1 D2 90 100 Quantity of Ice-Cream Cones Copyrightâ2003 Southwestern/Thomson Learning Elasticity and Tax Incidence Whatwastheimpactoftax? Taxesdiscouragemarketactivity Whenagoodistaxed,thequantitysoldissmaller. Buyersandsellerssharethetaxburden Copyright â 2004 South-Western/Thomson Learning Figure A Tax on Sellers Price of Ice-Cream Price Cone buyers pay $3.30 3.00 Price 2.80 without tax S2 Equilibrium with tax S1 Tax ($0.50) A tax on sellers shifts the supply curve upward by the amount of the tax ($0.50) Equilibrium without tax Price sellers receive Demand, D1 90 100 Quantity of Ice-Cream Cones Copyright©2003 Southwestern/Thomson Learning Figure A Payroll Tax Wage Labor supply Wage firms pay Tax wedge Wage without tax Wage workers receive Labor demand Quantity of Labor Copyright©2003 Southwestern/Thomson Learning Elasticity and Tax Incidence • In what proportions is the burden of the tax  divided? • How do the effects of taxes on sellers compare  to those levied on buyers?  • The answers to these questions depend on the  elasticity of demand and the elasticity of  supply Copyright © 2004 South-Western/Thomson Learning Figure How the Burden of a Tax Is Divided (a) Elastic Supply, Inelastic Demand Price When supply is more elastic than demand Price buyers pay Supply Tax the incidence of the tax falls more heavily on consumers Price without tax Price sellers receive than on producers Demand Quantity Copyright©2003 Southwestern/Thomson Learning Figure How the Burden of a Tax Is Divided (b) Inelastic Supply, Elastic Demand Price When demand is more elastic than supply Price buyers pay Supply Price without tax than on consumers Tax Price sellers receive the incidence of the tax falls more heavily on producers Demand Quantity Copyright©2003 Southwestern/Thomson Learning ELASTICITY AND TAX INCIDENCE So, how is the burden of the tax divided? • The burden of a tax falls more  heavily on the side of the  market that is less elastic Copyright © 2004 South-Western/Thomson Learning Summary • Price controls include price ceilings and price  floors •  A price ceiling is a legal maximum on the  price of a good or service.  An example is rent  control • A price floor is a legal minimum on the price of  a good or a service.  An example is the  minimumwage Copyright â 2004 South-Western/Thomson Learning Summary Taxesareusedtoraiserevenueforpublic purposes • When the government levies a tax on a good,  the equilibrium quantity of the good falls • A tax on a good places a wedge between the  price paid by buyers and the price received by  sellers Copyright © 2004 South-Western/Thomson Learning Summary • The incidence of a tax refers to who bears the  burden of a tax • The incidence of a tax does not depend on  whether the tax is levied on buyers or sellers • Theincidenceofthetaxdependsontheprice elasticitiesofsupplyanddemand Theburdentendstofallonthesideofthe marketthatislesselastic Copyright â 2004 South-Western/Thomson Learning .. .Supply, Demand, and Government Policies • In a free, unregulated market system, market  forces establish equilibrium prices and exchange quantities • Whileequilibriumconditionsmaybeefficient,... Whileequilibriumconditionsmaybeefficient, itmaybetruethatnoteveryoneissatisfied. Oneoftherolesofeconomistsistousetheir theoriestoassistinthedevelopmentofpolicies Copyright â 2004 South-Western/Thomson Learning CONTROLS ON PRICES •... quantity Quantity of Ice-Cream Cones Figure A Market with a Price Ceiling (b) A Price Ceiling That Is Binding Price of Ice-Cream Cone Supply Equilibrium price $3 Price ceiling Shortage Demand 75 125