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Economics A100 Lecture Notes - Lecture 8: Economic Equilibrium, Demand Curve, Shortage

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School
Orange Coast College
Department
Economics
Course
Economics A100
Professor
Tierney

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Document Summary

Technology determines how much inputs are required to produce. Increase the quantity supplied at each price. If good not perishable, sellers may adjust supply when their expectation of future prices change. Supply curve shifters: variables that influence sellers: equilibrium. Occur where the supply and demand curves cross. Occur where the quantity demanded is equal to the quantity supplied. If the price is below equilibrium level. Quantity demanded will exceed quantity supplied causing excess demand & shortage. If the price is above the equilibrium level. Quantity supplied will exceed quantity demanded causing excess supply & surplus. Ex: customers and seller agrees on a fixed price. Shifts in equilibrium price and quantity: four steps process. Decide whether event will affect supply and demand. Decide whether effect on supply and demand is negative or positive. Draw the appropriate shifted supply and demand curve. Compare the new equilibrium price and quantity to the original ones.

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Related Questions

When demand for a good is very elastic, revenue ________ when the price falls.

(2)

An elasticity measure less than one means that demand is __________.

(3)

An elasticity measure greater than one means that demand is __________.

(4)

The Latin expression ceteris paribus means

having made all other necessary changes.

holding constant all other variables.

assuming all households have similar incomes.

given the level of income in the economy.

(5)

A variable measured in terms of money is called a ____________________.

real variable

nominal variable

macroeconomic variable

microeconomic variable

(6)

Which of the following is true about the importance of money in economics?

Money is important in both macroeconomics and microeconomics.

Money is important in macroeconomics but not microeconomics.

Money is important in microeconomics but not macroeconomics.

Money is not important in either microeconomics or macroeconomics.

(7)

What is the difference between normative and positive economics?

Positive economics is descriptive and predictive; normative economics is prescriptive.

Positive economics highlights the positive aspects of the economy; normative economics highlights the average features.

Positive economics studies the actions of individuals; normative economics studies the actions of households.

Positive economics is an applied social science; normative economics is a theoretical social science.

(8)

The slope of the demand curve is negative because

the quantity of a good demanded decreases as income declines.

the quantity of a good demanded increases as income declines.

the quantity of a good demanded increases as the price declines.

the quantity of a good demanded decreases as the price declines.

(9)

What is the result of an increase in the price of bread, a normal good?

The demand curve shifts to the right.

The demand curve shifts to the left.

The quantity demanded increases.

The quantity demanded decreases.

(10)

What is the effect on demand for bread when the price of bagels, a substitute for bread, rises?

The demand curve for bread shifts to the right.

The demand curve for bread shifts to the left.

The quantity of bread demanded increases.

The quantity of bread demanded decreases.

(11)

Which of the following would cause the supply curve for bread to shift inward?

An increase in the price of bread

An increase in the price of bagels

A decrease in the price of bread

An increase in the price of flour

(12)

An improvement in technology shifts the supply curve outward because

at every price, firms find producing the good to be more profitable.

the price of the good increases.

at every price, firms find producing the good to be less profitable.

the price of the good decreases.

(13)

Which of the following factors does not affect how much bread a baker is willing to produce?

The price of bread

The demand for bread

The cost of inputs

Technology

(14)

How do expectations of prices affect how much of a good producers are willing to sell?

Expectations of prices affect only demand, not supply.

Actual prices, not expectations of prices, affect supply.

If producers expect prices to fall in the future, they supply less at every price.

If producers expect prices to rise in the future, they supply less at every price.

(15)

When the price of a good is above equilibrium level,

the quantity demanded exceeds the quantity supplied.

the quantity supplied exceeds the quantity demanded.

the supply curve shifts to the left.

the supply curve shifts to the right.

(16)

At a price of P0 in the diagram below, which of the following statements is true?

Supply equals demand.

There is excess demand.

There is excess supply.

There is scarcity.

(17)

If demand for bread increases at every price, the equilibrium price of bread will

fall.

rise.

remain unchanged.

depend on income.

(18)

If the demand for bread declines, then

at the original equilibrium price, there is excess demand.

at the original equilibrium price, there is excess supply.

the supply curve shifts to the right.

the supply curve shifts to the left.

(19)

Peanut butter and jelly are complementary goods. When the price of peanut butter rises, the demand for jelly ________ and the price of jelly ________.

rises; falls

rises; rises

falls; rises

falls; falls

(20)

The measure of elasticity that economists use is

always a positive number.

always a negative number.

positive when demand is elastic and negative when demand is inelastic.

negative when demand is elastic and positive when demand is inelastic.

(21)

Which of the following formulas is the correct expression for the slope of a line?

(22)

Graphically how would an increase in income affect the demand for hamburgers?

The slope of the demand curve would increase.

The slope of the demand curve would decrease.

The demand curve would shift outward, parallel to the original demand curve.

The demand curve would shift inward, parallel to the original demand curve.

(23)

Given the equation P = $6.00 ? $.40Q, where P is the price of the good and Q is the quantity of the good demanded, how many units will this consumer demand if the price is $3.60?

1.44 units

3 units

3.6 units

6 units

(24)

Which of the following is true about unit elasticity?

Revenues remain unchanged when the price changes.

Elasticity of demand increases as one moves down the demand curve.

Elasticity of demand decreases as one moves down the demand curve.

The elasticity of demand is greater than one at every point along the demand curve.

(25)

Which of the following could be a determinant of the quantity demanded of a good?

The price of the good

The price of related goods

Income

Expectations about the future price of the product

All of the above

1 an imperfect market, individual firms

A.are always able to set the price of their product.
B.are able to influence the price of their product.
C.have no influence over the price of their product.

D.take the market price as given.

1 Which of the following is NOT characteristic of a market economy?

Significant government intervention
Little or no government intervention
Buyers and sellers motivated by self-interest
Prices determined by demand and supply

2 In a competitive market, the price of the product is

independently set by each competing seller.
set by the market leader and then copied by other sellers.
jointly set after a meeting of all sellers in the market.
set by market supply and demand.

3 Which of the following firms participates in a competitive market?

A new car manufacturer, such as Ford, Honda, Toyota, or GMC
A software producer, such as Microsoft
A corn farmer
A local electric utility company

4 In an imperfect market, individual firms

are always able to set the price of their product.
are able to influence the price of their product.
have no influence over the price of their product.
take the market price as given.

5 Which of the following firms operates as a monopoly?

A car manufacturer
A local water utility
A corn farmer
A fish vendor at a neighborhood market

6 According to the law of demand, what is the relationship between price and quantity demanded?

Direct
No relationship
Inverse

7 Refer to the following graph. The demand curve slopes downward because
Click to view graphic. (Links to an external site.)

prices and quantity demanded move in opposite directions.
prices and quantity demanded move in the same direction.
prices and quantity demanded have no relationship.
prices and quantity demanded remain unchanged.

8 A change in which of the following will cause a change in the quantity demanded of coffee?

Consumer income
The price of green tea, a substitute for coffee
The number of coffee consumers
The price of coffee

9 Suppose that burgers and fries are complements in consumption. If the price of fries increases

overall demand for burgers will increase.
overall demand for burgers will decrease.
quantity demanded for burgers will increase.
quantity demanded for burgers will decrease.

10 Suppose that Coca Cola and Pepsi are substitutes in consumption. If the price of Coca Cola decreases, then

both the equilibrium price and the quantity of Pepsi demanded will decrease.
both the equilibrium price and the quantity of Pepsi demanded will increase.
the equilibrium price of Pepsi will increase and the quantity demanded of Pepsi will decrease.
the equilibrium price of Pepsi will decrease and the quantity demanded of Pepsi will increase.

11 According to the law of supply, what is the relationship between price and quantity supplied?

Direct
No relationship
Inverse
It depends on the change in price

12 Refer to the graph below. The supply curve is _______________ driven by the law of supply.
Click to view graphic. (Links to an external site.)

Downward sloping
Upward sloping
Perfectly vertical
Perfectly horizontal

13 A change in which of the following will cause a change in the quantity supplied of coffee?

The technology or the production process of making coffee
Anticipation of a change in the price of coffee
The wages of coffee bean pickers
The price of coffee

14 Which of the following will cause a rightward shift in the supply curve for tobacco?

A fall in the number of tobacco farmers in the market
An increase in taxes on tobacco
Removal of government subsidies to tobacco farmers
An improvement in the technology used in the production of tobacco

15 Flour is a factor of production of cupcakes. How will an increase in the price of flour affect the market for cupcakes?

Overall supply will increase
Overall supply will decrease
Quantity supplied will increase
Quantity supplied will decrease

16 Refer to the following image. When a market is in equilibrium, which of the following is true?
Click to view graphic. (Links to an external site.)

Quantity supplied exceeds quantity demanded
Quantity supplied is less than quantity demanded
Quantity supplied is equal to quantity demanded
There is no relationship between quantity supplied and quantity demanded

17 Refer to the following figure. At a price of $15, this market is experiencing a(n)
Click to view graphic. (Links to an external site.)

equilibrium.
shortage.
surplus.
none of the above are true.

18 Refer to the following figure. At a price of $5, this market is experiencing
Click to view graphic. (Links to an external site.)

equilibrium.
a shortage.
a surplus.
None of the above are true.

19 Suppose pasta salad is a normal good. If the price of pasta (a major ingredient in pasta salad) increases and income also increases, the

equilibrium quantity and equilibrium price of pasta salad will increase.
equilibrium quantity of pasta salad will decrease and the equilibrium price of pasta salad may either increase or decrease.
equilibrium quantity of pasta salad may either increase or decrease and the equilibrium price of pasta salad will increase.
equilibrium quantity and equilibrium price of pasta salad will both decrease.

20. What must happen to the market price in order for a shortage to be eliminated?

Price must fall.
Price must rise.
Price must stay the same.
Price may rise or fall depending on the size of the shortage.

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.