ECON 2030 Lecture Notes - Determinant, Price Discrimination, Price Controls

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2 Jul 2014

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Today"s menu: monday 16 june 2014: business, practice problems, chapter 5: 1, 2, 4, 5, 7, 8, 10, chapter 6: 1-4, 7-10, 12, 14, 18-20, first exam: next time. A price ceiling can only be binding if it is set under the equilibrium price. If ceiling is enforced, our current price is too high and therefore not allowable. When that happens, the price has to go down quantity demanded increases quantity supplied decreases. Quantity transacted goes down => persistent shortage. A floor price to be binding has to be set above the equilibrium price. If the floor price is enforced, our current price is too low and it will pushed up. When that happens, the price goes up quantity demanded decreases quantity supplied increases quantity transacted goes down => persistent surplus: elasticity = responsiveness in the face of a given action. Ex: action - price went up by 20%; reaction quantity demanded went down by 100%

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QUESTION 38

You are the president of the United States. In an attempt to make gasoline prices cheaper, you have imposed a binding price ceiling on gas. What would you expect your critics to say?

	a.	The binding price ceiling will cause firms to minimize their spending on the research and development of alternatives to gasoline.
	b.	The binding price ceiling will discourage individuals from using their personal automobile to commute to work or school.
	c.	The binding price ceiling will increase the likelihood that customers obtain needed gasoline on the black market.
	d.	The binding price ceiling will encourage oil companies to deplete the resource too quickly.
	e.	The binding price ceiling will cause firms to produce only gasoline of the highest quality.

1.05000 points

QUESTION 39

If a firm's long-run average total costs increase as it increases its scale of production, the firm is experiencing:

	a.	increasing returns from specialization.
	b.	diseconomies of scale.
	c.	economies of scale.
	d.	constant returns to scale.
	e.	diminishing marginal product.

1.05000 points

QUESTION 40

A(n) __________ in the elasticity of supply or demand in a market for a good that is taxed would tend to __________ tax revenue from that tax.

	a.	increase; increase
	b.	increase; have no effect on
	c.	decrease; have no effect on
	d.	decrease; decrease
	e.	increase; decrease

1.05000 points

QUESTION 41

The costs of a market activity paid for by an individual engaged in the market activity are:

	a.	external costs.
	b.	social costs.
	c.	common costs.
	d.	free-rider costs.
	e.	internal costs.

1.05000 points

QUESTION 42

Assume that the price of rubber increased at the same time that Michael Jordan, arguably the best NBA basketball player of all time, became famous. What do you expect to happen to the equilibrium price and equilibrium quantity of the basketball shoes that are promoted by Michael Jordan?

	a.	Equilibrium price will go down and equilibrium quantity will be indeterminate.
	b.	Equilibrium price will go up and equilibrium quantity will go down.
	c.	Equilibrium price will go up and equilibrium quantity will be indeterminate.
	d.	Equilibrium price will go down and equilibrium quantity will go up.
	e.	Equilibrium price will go up and equilibrium quantity will go up.

1.05000 points

QUESTION 43

The minimum wage law is an example of a:

	a.	price floor.
	b.	law that sets the minimum number of hours that an employee must work for wages during the week.
	c.	law that allows individual employers and employees to make free decisions.
	d.	law that requires quantity demanded to equal quantity supplied.
	e.	price ceiling.

taupezebra466

I've completed this but I want to check my answers. Thanks

1) List and briefly explain three economic variables that shift the Demand Curve.

2) Define opportunity cost. How is opportunity cost used to determine comparative advantage?

3) In the market for calculators we observe that the price has fallen and more calculators are being sold. What might have happened to cause this change?

4) The price of gasoline rises. What would we expect to see happen in the market for cars with high gas mileage (like the Prius)?

5) What is the effect of a price floor (a price set above equilibrium) in the sugar market. Why does the government impose price floors?

6) Define the price elasticity of demand. Why is this concept important in economics?

7) Define the income elasticity of demand. Why is this concept important in economics?

8) List and briefly explain three economic variables that shift the Supply Curve.

9) A firm lowers of price of its product by 10% and consumers buy 5% more of the product. What is the price elasticity of demand for the product?

10) If the price elasticity of demand for a product is elastic, explain what will happen to total revenue when the price is decreased.

11) What is the difference between a change in quantity supplied and a shift in supply?

12) Write out the equation for the arc price elasticity of demand using symbols. Then write out the equation using the following numbers: the price increases from $8 to $10 and the quantity demanded falls from 3 units to 2 units. (Do not calculate the equation.)
Three Questions (no choice)

Long Answer Questions (20 points each)

Be certain to label all graphs. Write all explanations in complete sentences.

1) Draw a supply and demand graph for the market for oranges.

Illustrate and explain what happens with when a freeze destroys part of the crop.

2) Draw an increasing cost Production Possibilities Curve (PPC) for the U.S. with computers on the horizontal axis and textiles on the vertical axis.
a) What is the definition of a PPC

b) Choose a point on the PPC. What does this point represent?

c) Illustrate the opportunity cost of producing more computers.

d) Explain a point inside the PPC.

e) Explain a point outside the PPC.

f) Technological change reduces the cost of producing computers and textiles, illustrate and explain what happens in the graph.

g) Choose a new point that represents production and consumption after technological change.

h) Where does the U.S. produce and consume relative to before technological change.

i) Illustrate and explain the opportunity cost of producing more computers after technological change.

3) Define the price elasticity of demand. What does elastic, inelastic and unitary price elasticity of demand mean? For each of the three values of the price elasticity of demand explain what happens to quantity demanded and total revenue when the price of the product is increased? What about when the price of the product is decreased?

4) Using a supply and demand graph in the market for bread, illustrate and explain the effect of a price ceiling (Price set below equilibrium price).

Why would the government impose such a price ceiling?

How is the available bread distributed to consumers when there is a price ceilin

1. Using supply-and-demand diagrams, show the effect of the following events on the market for sweatshirts.

(a) A hurricane in South Carolina damages the cotton crop.

(b) The price of leather jackets falls.

(d) New knitting machines are invented.

2. (a) What is the definition of quantity demanded?

(b) What is the definition of quantity supplied?

(d) Choose one of the factors from part (b) and consider the market for bananas. On a well-labeled diagram, demonstrate what will occur in this market if there is a change in this factor.

(e) List the 4 factors that cause the supply curve to shift to the left or the right.

(f) Choose one of the factors from part (e) and consider the market for scooters. On a well-labeled diagram, demonstrate what will occur in this market if there is a change in this factor.

(g) Choose one factor from part (b) and another from part (e) and consider the market for minivans. On a well-labeled diagram, demonstrate what will occur in this market given the change in both factors. (Hint: Draw separate diagrams for parts (d), (f), & (g))

3. Suppose that the price of basketball tickets at your college is determined by market forces. Currently, the demand and supply schedules are as follows:

page1image3877024

(a) Draw the demand and the supply curves. What is unusual about this supply curve? Why might this be true?

(b) What are the equilibrium price and quantity of tickets?

(c) Your college plans to increase total enrollment next year by 5,000 students. The additional students will have the following demand schedule:

page1image3870304

Now add the old demand schedule and the demand schedule for the new students to calculate the new demand schedule for the entire college. What will be the new equilibrium price and quantity?

4. Market research has revealed the following information about the market for chocolate bars: The demand schedule can be represented by the equation QD = 1600 − 300P, where QD is the quantity demanded and P is the price. The supply schedule can be represented by the equation QS = 1400 + 700P, where QS is the quantity supplied.

(a) Sketch a graph representing the market for chocolate bars. Identify the equilibrium point on your graph.

(b) Calculate the equilibrium price and quantity in the market for chocolate bars.

5. For each of the following pairs of goods, which good would you expect to have more elastic demand and why?

(a) Required textbooks or mystery novels

(b) Beethoven recordings or classical music recordings in general

(d) Root beer or water

(e) Insulin or Tylenol

(f) Food or bananas

6.Consider the following information from the market for lemonade:

Price	Quantity Demanded	Quantity Supplied
$1	500 cups	150 cups
$2	200 cups	310 cups

(a) As the price changes from $1 to $2, what is the value of price elasticity of demand?

(b) As the price changes from $1 to $2, what is the value of price elasticity of supply?

(c) Sketch a diagram demonstrating the market for lemonade. Are the supply and demand curves relatively inelastic or elastic? Explain.

(d) Suppose that when the price of lemonade increases from $1 to $2, the quantity demanded of orange juice increases from 150 cups to 190 cups. Calculate cross-price elasticity of demand for orange juice.

(e) Are orange juice and lemonade substitute or complementary goods? Explain.

7. Suppose that business travelers and vacationers have the following demand for airline tickets from New York to Boston:

page2image1834528

(a) As the price of tickets rises from $200 to $250, what is the price elasticity of demand for (i) business travelers and (ii) vacationers? (Use the midpoint method in your calculations)

(b) Why might vacationers have a different elasticity from business travelers?

8. Suppose the price elasticity of demand for heating oil is 0.2 in the short run and 0.7 in the long run.

(a) If the price of heating oil rises from $1.80 to $2.20 per gallon, what happens to the quantity of heating oil demand in the short run? In the long run? (Use the midpoint method in your calculations)

(b) Why might this elasticity depend on the time horizon?

9. The Government has decided that the free-market price of cheese is too low.

(a) Suppose the government imposes a binding price floor in the cheese market. Draw a supply-and-demand diagram to show the effect of this policy on the price of cheese and the quantity of cheese sold. Is there a shortage or surplus of cheese?

(b) Farmers complain that the price foor has reduced their total revenue. Is this possible? Explain

(c) In response to farmer's complaints, the government agrees to purchase all the surplus cheese at the price floor. Compared to the basic price floor, who benefits from this new policy? Who loses?

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ECON 2030 Lecture Notes - Determinant, Price Discrimination, Price Controls

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