ECO 120 - Global Macroeconomics TAGGERT J. BROOKS FALL 2013.

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ECO Global Macroeconomics TAGGERT J. BROOKS FALL 2013

Module 08 SUPPLY AND DEMAND: PRICE CONTROLS

Why Governments Control Prices The market price moves to the level at which the quantity supplied equals the quantity demanded. BUT this equilibrium price does not necessarily please either buyers or sellers. Therefore, the government intervenes to regulate prices by imposing price controls, which are legal restrictions on how high or low a market price may go. 3 of 19

Why Governments Control Prices Price ceiling is the maximum price sellers are allowed to charge for a good or service. Price floor is the minimum price buyers are required to pay for a good or service. 4 of 19

Price ceilings Price ceilings are typically imposed during criseswars, harvest failures, natural disastersbecause these events often lead to sudden price increases that hurt many people but produce big gains for a lucky few. 5 of 19

Price ceilings Examples: The U.S. Government imposed ceilings on aluminum and steel during World War II. Rent control in New York. 6 of 19

The Market for Apartments in the Absence of Government Controls $1,400 1,300 1,200 1,100 1, Quantity of apartments (millions) Monthly rent (per apartment) D E S $1,400 1,300 1,200 1,100 1, Quantity supplied Quantity demanded Monthly rent (per apartment) Quantity of apartments (millions)

The Effects of a Price Ceiling $1,400 1,200 1, Quantity of apartments (millions) Monthly rent (per apartment) D S E BA Price ceiling 8 of 19 Housing shortage of 400,000 apartments caused by price ceiling

How Price Ceilings Cause Inefficiency Inefficient Allocation to Customers Wasted Resources Inefficiently Low Quality Black Markets 9 of 19

So Why Are There Price Ceilings? Case: Rent Control in New York Price ceilings hurt most residents but give a small minority of renters much cheaper housing than they would get in an unregulated market. When price ceilings have been in effect for a long time, buyers may not have a realistic idea of what would happen without them. Government officials often do not understand supply and demand analysis! 10 of 19

Price Floors Sometimes governments intervene to push market prices up instead of down. The minimum wage is a legal floor on the wage rate, which is the market price of labor. Just like price ceilings, price floors are intended to help some people but generate predictable and undesirable side effects. 11 of 19

The Market for Butter in the Absence of Government Controls $1.40 $1.30 $1.20 $1.10 $1.00 $0.90 $0.80 $0.70 $ Quantity of butter (millions of pounds) Price of butter (per pound) Quantity supplied Quantity demanded Quantity of butter (millions of pounds ) $ Price of butter (per pound) D S E 12 of 19

The Effects of a Price Floor $ D S E BA Butter surplus of 3 million pounds caused by price floor Price floor Quantity of butter (millions of pounds) Price of butter (per pound) 13 of 19

How a Price Floor Causes Inefficiency The persistent surplus that results from a price floor creates missed opportunitiesinefficienciesthat resemble those created by the shortage that results from a price ceiling. These include: Inefficiently low quantity Inefficient allocation of sales among sellers Wasted resources Inefficiently high quality Temptation to break the law by selling below the legal price 14 of 19

How a Price Floor Causes Inefficiency Price floors lead to inefficient allocation of sales among sellers : those who would be willing to sell the good at the lowest price are not always those who actually manage to sell it. Price floors often lead to inefficiency in that goods of inefficiently high quality are offered: sellers offer high-quality goods at a high price, even though buyers would prefer a lower quality at a lower price. 15 of 19