quiz #4. what should be on the graph? x axis, the horizontal line usually represents quantity. y...
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Quiz #4
What should be on the graph?
• X axis, the horizontal line usually represents quantity.
• Y axis, the vertical line usually represents price.
• The whole graph should describe the supply and demand of ONE product.
• Draw both supply and demand curves on the same graph.
Graph you should keep in mind
quantity
price
Demand curve(downward sloping)
Supply curve(upward sloping)
equilibrium
Pe
Qe
Movement or Shift
• Movement is caused only by the change of the price of the product on the graph.
• Lots of factors cause shift. (review your notes)
Equilibrium
• For a pair of given demand and supply curves, there is only one intersection, therefore only one equilibrium.
• You will get a new equilibrium after the shift of supply or demand curve.
• The movement along supply or demand curve doesn’t give you a new curve, thus your can’t get a new equilibrium.
• Quiz, question 2, a-d
One step deeper
• After the change of equilibrium, the equilibrium price is also changed.
• The change of the price will probably cause the change of the supply or demand.
• Quiz 4, question 1
Examples of supply and demand
• Example 1 market for gasoline in summer
• Example 2 housing analysis
• Example 3 price control and rent control
• Example 4 cigarettes tax-who pays
Homework
• Page 95– 1,5,7,10
• Page 121– 7,8
Chapter 5
The price system, supply and demand, and elasticity
The Price System: Rationing and Allocating Resources
• The price system performs two important and closely related functions in a society with unregulated markets. – PRICE RATIONING– ALLOCATING RESOURCES
PRICE RATIONING
• PRICE RATIONING: is the process by which the market system allocates goods and services to consumers when quantity demanded exceeds quantity supplied.
• Consider the following example in the market for lobster...
This rationing process determines:
• This rationing process determines:
• the allocation of resources among suppliers
• the final mix of output to be allocated across consumers
Price Rationing in the Market for Lobsters
• Figure 5.1
• At $3.27, the quantity demanded and quantity supplied are both 47 lobsters.
• Suppose the supply of lobster shifts to the left.
• At a price of $3.27, there is now a demand of 22 lobsters.
Equilibrium is restored.
• Equilibrium is restored at a price of $4.50.
• Quantity supplied rises and quantity demanded falls as price rises.
• Thirty-five million pounds of lobster is “rationed ” to the consumers who are willing and able to pay $4.50 per pound for it.
Constraints on the market and alternative rationing mechanisms
• Some of these methods include:– Price ceilings: a maximum price that sellers may charge
for a good, usually set by government.– Queuing: waiting in line as a means of distributing goods
and services; a non price rationing mechanism.– Favored customers: those who receive special treatment
from dealers during situations of excess demand.– Ration coupons: tickets or coupons that entitle
individuals to purchase a certain amount of a given product per month.
– Black market: a market in which illegal trading takes place at market-determined prices.
Oil supply in 1973-1974
• Figure 5.3
• Congress: price ceiling
• Most common non price rationing system: queuing…
• A second device: favored customers
• Another way: ration coupons
• Black market
Price and the allocation of resources
• Figure 5.4
World Cup Soccer championship in 1994...
• Consider the market for tickets to major sporting events, like the finals of the World Cup Soccer championship in 1994...
• The problem with these alternatives: excess demand is created but not eliminated.
World Cup Soccer championship in 1994...
$3,000
The average ticket price was set at $300 for the final game of the World Cup.
$300
This price was below the equilibrium price, and scalpers made a tidy profit. Can you explain why?
Scalper’s profit
The actual demand curve
SUPPLY AND DEMAND ANALYSIS: AN OIL IMPORT FEE
• An oil import fee would place a tax on all oil imported into the U.S...
• Why might politicians choose to impose such a tax?
The world and US markets for crude oil in 1989 (w/o tax)
p
q
p
q
Sworld
D.usa
S.usa
Dworld
$18
Millions of Barrels/day Millions of Barrels/day56 7.7 13.6
5.9
The import tax raises the price of all gasoline in the U.S.
p
q
D.usa
S.usa
$18$24
Millions of Barrels/day7.7 13.6
5.9
What is the impact of this policy on :•domestic producers? •foreign producers? •U.S. consumers? •U.S. government?
The import tax raises the price of all gasoline in the U.S.
p
q
D.usa
S.usa
$24
7.7 13.6
5.9
p
q
D.usa
S.usa
$24
9.0 12.2
3.2
$18 $18Import fee
Government tax revenue
Review questions
• What is price rationing?
• Apply the knowledge.