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ECON 1BB3 Lecture Notes - Demand Curve, Shortage, Economic Equilibrium

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blushantelope733
29 Nov 2012
School
McMaster University
Department
Economics
Course
ECON 1BB3
Professor
Bridget O' Shaughnessy

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ECON 1BB3 Full Course Notes
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Document Summary

Equilibrium price: the price for which qs = qd. Equilibrium quantity: the quantity that corresponds to equilibrium price. If qs > qd there is a surplus. Stocks build up and firms decrease price until equilibrium is restored. If qs < qd there is a shortage. Concerts are a good example of excess demand. The supply for seats at some point is fixed whereas apple can make more iphone 5"s. People line up, firms increase price and sell more until equilibrium is restored. Three-step program for analyzing changes in equilibrium (comparative statistics.

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Related Questions

The primary difference between a change in supply and a change in the quantity supplied is:
Choose one answer.
a. a change in quantity supplied is a shift in the supply curve, and a change in supply is a movement along the supply curve.
b. both a change in quantity supplied and a change in supply are movements along the supply curve, only in different directions.
c. a change in quantity supplied is a movement along the supply curve, and a change in supply is a shift of the supply curve.
d. a change in supply is a movement to the left along the supply curve and a change in quantity supplied is a movement to the right along the supply curve.

Question 2
What is the difference between a shortage and scarcity?
Choose one answer.
a. Scarcity will always exist because choices must be made, but a shortage will only exist if the price is kept below the equilibrium level.
b. Scarcity is a result of two or more alternative uses and will always exist, and quantities of supply and demand adjusting to flexible prices will create shortages.
c. A surplus will exist when a good is scarce; a shortage merely implies that there isn't as much of something as people would like, which is nearly always the case.
d. There is no distinction between the two. They are the same thing.

Question 3
A decrease in supply means:
Choose one answer.
a. a shift to the left of the entire supply curve.
b. moving downward (to the left) along the supply curve with lower prices.
c. less will be demanded at every price.
d. more will be supplied at every price.

Question 4
A decrease in demand, with no change in supply, will lead to ________ in equilibrium quantity and ________ in equilibrium price.
Choose one answer.
a. an increase; an increase
b. an increase; a decrease
c. a decrease; an increase
d. a decrease; a decrease

Question 5
After graduation from college you will receive a substantial increase in your income from a new job. If you decide that you will purchase more T-bone steak and less hamburger, then for you hamburger would be considered a( n ):
Choose one answer.
a. normal good.
b. substitute good.
c. complementary good.
d. inferior good.

Question 6
There is equilibrium in the market when:
Choose one answer.
a. there is no shortage.
b. there is no surplus.
c. price is established where the supply curve and the demand curve intersect.
d. all of the above are true.

Question 7
Which would not cause the supply curve to shift?
Choose one answer.
a. a change in technology
b. a change in factor costs
c. a change in the price of the good
d. a change in the prices of related goods

Question 8
Given that meat and potatoes are complementary goods, if the price of meat decreases substantially, there would be:
Choose one answer.
a. an increase in the demand for potatoes.
b. an increase in the quantity of potatoes demanded.
c. a decrease in the demand for potatoes.
d. no change in the demand for potatoes.

Question 9
Given that milk and cookies are complements, suppose the price of flour (an ingredient in cookies) rises. What happens in the market for milk?
Choose one answer.
a. The equilibrium price and quantity rise.
b. The equilibrium price rises and the equilibrium quantity falls.
c. The equilibrium price and quantity fall.
d. The equilibrium price falls and the equilibrium quantity rises.

Question 10



A temporary price of $2 in this market would result in:
Choose one answer.
a. a surplus of 8,000 bushels.
b. a shortage of 8,000 bushels.
c. a shortage of 10,000 bushels.
d. a surplus of 10,000 bushels.

Question 11
The price of oranges rises. What happens in the market for apples, which are a substitute for oranges?
Choose one answer.
a. The equilibrium price falls, and the equilibrium quantity rises.
b. The equilibrium price rises, and the equilibrium quantity falls.
c. The equilibrium price and quantity rise.
d. The equilibrium price and quantity fall.

Question 12
A market surplus occurs if the:
Choose one answer.
a. price is below the equilibrium price.
b. price is equal to the equilibrium price.
c. equilibrium price is above the actual price.
d. equilibrium price is below the actual price.

1. A change in quantity supplied:

A. refers to a shift in the supply curve.

B. results from a change in a determinant of supply.

C. refers to a movement along a given supply curve.

D. is caused by a change in the number of sellers in the industry.

 

2. Which one of the following would most likely cause the supply curve for microwaves to shift to the right:

A. a decrease in the price of microwaves.

B. an increase in the wage rate earned by workers who produce microwaves.

C. a decrease in consumer preferences for microwaves.

D. an increase in the number of firms that produce microwaves

 

3. If the actual price sellers are pricing their goods at is currently above the equilibrium price. There is a ____________. Therefore, we would expect sellers to ____________ the price until the market reaches equilibrium.

A.

surplus; raise
B.

surplus; lower
C.

shortage; raise
 

D. shortage; lower

4. Suppose the demand and the supply of wine both increase. The net effect of these changes in demand and supply will be

A

an increase in equilibrium quantity, but a decrease in equilibrium price.
B

an increase in equilibrium price and quantity.
C.

an increase in equilibrium price, but the change in equilibrium quantity is indeterminate.
D.

an increase in equilibrium quantity, but the change in equilibrium price is indeterminate.

 

Q1. If the price of a complement increases, all else equal, ----------------------------

Q2. Which of the following would lead to an INCREASE in the demand for golf balls?

A) An decrease in the price of golf balls.

B) An increase in the price of golf clubs.

C) A decrease in the cost of producing golf balls.

D) An increase in average household income when golf balls are a normal good.

E) none of the above

Q3. If input prices increase, all else equal, --------------------------------

Q4. Which of the following would decrease the supply of wheat?

A) A decrease in the price of pesticides. B) An increase in the demand for wheat. C) A rise in the price of wheat. D) An increase in the price of corn. E) none of the above

Q5. When Sonoma Vineyards increases the price of its Chardonnay from $15 per bottle to $20 per bottle, the result is a decrease in…

A) the quantity of this wine demanded B) the quantity of this wine supplied.

C) the demand for this wine. D) the supply of this wine.

Q6. Which of the following will cause a change in quantity supplied?

A) Technological change. B) A change in input prices. C) A change in the market price of the good.

D) A change in the number of firms in the market. E) all of the above.

Q7. In which of the following cases will the effect on equilibrium output be indeterminate (i.e., depend on the magnitudes of the shifts in supply and demand)?

A) Demand decreases and supply decreases. B) Demand remains constant and supply increases.

C) Demand decreases and supply increases. D) Demand increases and supply increases. E) none of the above.

Use the following demand and supply functions to answer the next three questions.

Demand: QD= 600 - 30P Supply: QS = -300 + 120P

Q8. Equilibrium price and output are

A) P = $2 and Q = 540. B) P = $10 and Q = 300. C) P = $6 and Q = 420.

D) P = $3.33 and Q = 500. E) none of the above

Q9. If the price is currently $8, there is a --------------------------

A) surplus of 360 units. B) shortage of 360 units. C) surplus of 300 units.

D) shortage of 660 units. E) none of the above

Q10. If the price is currently $4, there is a

A) shortage of 300 units. B) shortage of 480 units. C) surplus of 180 units.

D) shortage of 180 units. E) none of the above

Q.11 The Free Indeed Company manufactures ladies’ shoes that are sold through discount houses. The shoes are sold for $20 each pair; the fixed costs are $110,000 for up to 30,000 pairs of shoes; variable costs are $13 per pair of shoes. What is the firm’s breakeven point in units sold?

a) 30,000 pairs of shoes b) 15,714 pairs of shoes c) 8,462 pairs of shoes d) 5,500 pairs of shoes

Q12. If the demand curve for British pounds shifts to the right, ---------------

a) the dollar price of British pounds will increase

b) the dollar price of British pounds will decrease

c) the exchange rate between dollars and pounds will be out of equilibrium

d) the pound will fall in value against the dollar

Q13. Judgments about "what ought to be" in economic matters. Can't be proven false, based on judgments

a. Macroeconomics b. Positive economics c. Normative economics d. Microeconomics

Q14. Which of the following statements is normative in nature?

A) That economics mid-term was tough!

B) Professor of economics put too many multiple-choice questions.

C) Neither of these statements is normative in nature

D) Both A & B of these statements are normative in nature