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ECON 202 Lecture Notes - Lecture 6: Economic Equilibrium, Demand Curve, Cost Curve

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School
Texas A&M University
Department
Economics
Course
ECON 202
Professor
Ephraim Karsagi

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Document Summary

The supply curve is exactly the negative of the slope of the ppf. Derived by how many consumers there are in the market and their distribution in the market. If the price of inputs rise, the opportunity cost also increases. If the cost increases, we are less likely to sell a product: decrease in supply shift to the left. Technological change when a firm experiences a positive or negative change in its ability to produce a given level of output with a given quantity of inputs. Changes raise or lower firms costs, hence, their supply of the good. Positive change lowers opportunity cost: examples: a new, more productive on land use for agriculture might decrease the supply of wheat, government restrictions on land use for agriculture might decrease the supply of wheat. Many firms can produce and sell more than one product: example: a farmer can plant corn or soybeans.

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Related Questions

1)The law of demand states that as the price of a good rise, _____.

A. buyers purchase more of the good because the price of a substitute has risen.

B. buyers purchase less of the good because their real income decreases with an increase in price.

C. buyers purchase more of the good because they expect prices to be even higher in the future

D. buyers purchase less of the good because they expect prices to fall in the future.

 

2) A movement along a demand curve can be attributed to a change in:

A. the quantity demanded of a good.

B. the demand for a good.

C. the substitution effect of consuming a good.

D. the opportunity cost of producing a good.

 

3) If we say that demand for a good has increased, we mean that there has been:

A. a leftward shift of the demand curve.

B. a rightward shift of the demand curve.

C. a leftward movement along the demand curve.

D. a rightward movement along the demand curve.

 

4) Which of the following will cause the demand curve for a normal good to shift to the right?

A. An increase in the price of a complementary good.

B. A decrease in income.

C. A decrease in the price of the good.

D. An increase in the price of a substitute good.

 

5)Which of the following best defines supply?

A. The amount of a good that is produced at the least possible cost, other things constant

B. The amount of a good that producers are willing and able to sell at each possible price, other things constant.

C. The amount of a good that consumers want to buy at different income levels

D. The amount of a good that producers want to sell at a fixed price

 

6)The market supply curve of a particular product indicates the total quantities:

A. that are actually sold during a given time period.

B. that sellers are willing to offer for sale at a fixed price.

C. that buyers are willing to purchase at alternative prices.

D. that sellers are willing and able to offer at alternative prices.

 

7)When quantity demanded of a good exceeds the quantity supplied at the prevailing market price, _____.

A. the demand curve shifts rightward until the surplus is eliminated

B. the market is in equilibrium.

C. the price of the good will tend to increase.

D. the price of the good will decrease

 

8)A shortage of textbooks is most likely to cause:

A. an increase in the price of textbooks.

B. a decrease in the supply of textbooks.

C. a decrease in the price of paper.

D. an increase in the cost of printing.

 

9)The most important characteristic of the equilibrium price is that it:

A. maximizes the quantity demanded.

B. clears the market, leaving neither a surplus nor a shortage.

C. minimizes the quantity demanded.

D. guarantees that producers earn the profit.

 

10)If both demand and supply increases in a market that is initially in equilibrium, the price will:

A. increase only if demand increases more than supply.

B. increase only if supply increases more than demand.

C. remain unchanged while quantity will increase.

D. remain unchanged while quantity will decrease.

1. In economics, the demand for a good refers to the amount of the good that people:
a. Will buy at alternative income levels
b. Need to achieve a minimum standard of living.
c. Will buy at various prices
d. Would like to have if the good were free
2. The term ceteris paribus means that:
a. What is for the individual is not necessarily true for the whole
b. All variables except those specified are constant
c. Everything is variable
d. No one knows which variables will change and which will remain constant.
3. When economist talk about supply, they are referring to a relationship between price received for each unit sold and the ____________________.
a. Quantity supplied
b. Demand schedule
c. Demand curve
d. Market price
4. But nearly all supply curves share a basic similarity: they slop______________.
a. Up from left to right
b. Down from left to right
c. Up from right to left
d. Down from right to left
5. The nature of demand indicates that as the price of a good increases:
a. Suppliers wish to sell less of it.
b. Buyers desire to purchase less of it
c. More of it is desired
d. More of it is produced
6. Any given demand or supply curve is based on the certeris paribus assumption that _______.
a. Everything is variable
b. All else is held equal
c. No one knows which variables will change and which will remain constant
d. What is true for the individual is not necessary true for the whole.
7. Economist refer to the relationship that a higher price leads to lower quantity demand as the ______________.
a. Price model
b. Law of demand
c. Market equilibrium
d. Income gap
8. A perfect elastic supply curve is:
a. Vertical
b. Downward sloping to the left
c. Horizontal
d. Upward sloping to the right
9. A 10 percent increase in the price of soda leads to a 20 percent increase in the quantity of iced tea demanded. It appears that:
a. Elasticity of demand for iced tea is 2 and is elastic
b. Cross-price elasticity of demand for iced tea is -2
c. Cross-price elasticity of demand for soda is -0.5
d. Elasticity of demand for soda 0.5 AND IS INELASTIC
10. ___________ is the change in what is on the horizontal axis (quantity) divided by the change in what is the vertical axis (price).
a. Elasticity
b. Supply
c. Demand
d. Revenue
11. A severe freeze has once again damaged the Florida orange crop. The impact on the market for orange juice will be a leftward shift of:
a. The supply curve and the rightward shift of the demand curve resulting in a higher equilibrium price
b. Both the supply and demand curves
c. The supply curve
d. The demand curve, as consumers try to economize because the shortage.
12. Got the answer.
13. A drought decreases the supply of agricultural products, which means that at any given price a lower quantity will be supplied; conversely, especially good weather would shift the _____________.
a. Demand curve to the right
b. Supply curve to the left
c. Supply curve to the right
d. Demand curve to the left
14. Interpret the following statements:

1. The Houston Chronicle reported that in Houston, the average price of new homes has decreased, while at the same time, the number of new homes sold has increased. This situation could be explained by which one of the following: (draw curves before answering)

  1. An Increase in demand
  2. An Increase in supply
  3. A Decrease in demand
  4. A Decrease in supply

2. In another market, the average price of new homes fell, while at the same time, the number of new homes sold decreased. The situation would best be explained by (Draw the curves before answering)

  1. An Increase in Demand
  2. An Increase in Supply
  3. A Decrease in demand
  4. A Decrease in supply

3. A consumer is said to have achieved maximum total utility when:

  1. Purchases of Good A give the same satisfaction as purchases of Good B.
  2. Purchases of the last dollar spent on Good A give the same satisfaction as purchases of the last dollar spent on Good B.
  3. The average purchases per dollar of Good A give the same satisfaction as the average purchases per dollar of Good B.
  4. The total utility derived from Good A is the same as the marginal utility derived from Good B.

4. You are given the following information about a firm's present output position: MPP (Marginal Physical Product) of Land = 12; MPP of Labor = 16; Price of Land = $2; Price of Labor = $4. With no additional money to spend, this firm should:

5. A firm achieves the least cost in production by substituting factors until

  1. their factor prices are equal
  2. their marginal products are equal to the factor prices
  3. their marginal products are each equal to zero
  4. the ratios of their marginal product equal the ratio of their prices
  5. none of the above

6.The economy is currently on its production possibilities frontier (PPF). A politician says that it is possible to get more of everything--more infrastructure, more schools, more national defense, more spending on social programs, and so on. The politician is

  1. correct if he is assuming a rightward-shifting PPF.
  2. incorrect if he is assuming a rightward-shifting PPF.
  3. correct if he is assuming a PPF that does not change.
  4. none of the above

7. Assume your swimsuit business is at its maximum profit position, and one new change occurs: consumer incomes decrease. If swimsuits are normal goods, the equilibrium price of swimsuits will __________, and the CONSUMER surplus will ________.

  1. increase, increase
  2. decrease, decrease
  3. increase, decrease
  4. decrease, increase

8. Firms that shuts-down in the short-run still must pay:

  1. Marginal cost
  2. Variable cost
  3. Fixed cost
  4. Total cost

9. The term externalities refer to:

  1. Black-market economic activity.
  2. The impact on markets of imported goods.
  3. The costs and benefits of a market activity borne by a third party.
  4. The inequitable distribution of income.

10. If full external costs are not internalized, firms will tend to allocate more of society's scarce resources to produce than is societally warranted, and if full external benefits are not internalized, firms will allocate less of society's resources to produce than is societally justified. True/False.

11. Joe was very careful about smoking in his home until he bought a fire insurance policy. After buying the policy, he became careless. His attitude is: "I'm insured. What do I care if this place burns down; I'll just collect the money". Joe's attitude is an example of ______________.

12. Megatrust Bank had historically scrutinized loans very carefully and extended them, only to persons whom they considered very creditworthy. They made relatively few loans. However, after the government provided guarantees to sub-prime loans, Megatrust relaxed its standards and increased its loan volume. (And its default rate as well.) This is an example of _______________.

13. In the short-run, if a perfectly competitive firm finds itself operating at a loss, it will

  1. Reduce the size of its plant to lower fixed costs.
  2. Raise the price of its product.
  3. Shut down.
  4. Continue to operate as long as it covers its variable cost.

14. If income today is more equally distributed than it was in 1960, a Lorenz Curve depicting today's distribution would be

  1. More bowed and to the left of the 1960's curve.
  2. More bowed and to the right of the 1960's curve.
  3. Less bowed and to the left of the 1960' curve.
  4. Less bowed and to the right of the 1960's curve.

15. Which of the following statements is true?

  1. As output increases, the average fixed cost becomes smaller and smaller.
  2. Average fixed cost does not change as output increases.
  3. The marginal cost curve intersects the average fixed cost curve at its minimum point.
  4. When marginal cost is greater than average fixed cost, average fixed cost increases.
  5.  

16. A firm in any of the market structures we have studied will maximize its profit (or minimizes its loss) when its

  1. Average costs are at a minimum
  2. Marginal revenue and marginal cost are the same.
  3. Marginal revenue is less than marginal cost.
  4. Marginal revenue is zero.

17. If the demand for a good increase, when the price of other good increases, these goods are

  1. Capital goods
  2. Substitute goods
  3. Complementary goods
  4. Luxury goods

18. Which of the following pairs of products are complementary goods?

  1. mobile phones and laptops
  2. pens and pencils
  3. sugar and artificial sweeteners
  4. radios and television
  5. toothbrushes and toothpaste

19. The amount of a good that is given up to produce another good is:

  1. Scarcity
  2. Specialization
  3. Opportunity cost
  4. Trade
  5. Efficiency

20. The most important characteristic of the equilibrium price is that it:

  1. Guarantees that producers earn a profit.
  2. Increases the quantity demanded.
  3. Clears the market.
  4. Decreases the quantity supplied.

21. Rank the following market structures based on the number of participating firms: From the fewest number of firms to the most number of firms:

  1. Oligopoly
  2. Perfect Competition
  3. Monopoly
  4. Monopolistic Competition

22. If firms in a monopolistically competitive market are earning economic profits which of the following scenarios would best reflect the change facing incumbent firms as the market adjusts to its new equilibrium?

  1. an increase in demand
  2. a decrease in demand
  3. a downward shift in their marginal cost curve
  4. an upward shift in their marginal cost curve


23. If labor in Mexico is less productive than labor in the United States in all areas of production, 

  1. neither nation can benefit from trade
  2. Mexico can benefit from trade but the United States cannot
  3. Mexico will not have a comparative advantage in any good
  4. both nations can benefit from trade

24. Which of the following statements is false?

  1. The typical monopolistically competitive firm could reduce its average total cost if it produced more output.
  2. Monopolistically competitive firms advertise to increase the elasticity of the demand curve they face.
  3. Expensive advertising might help consumers if it is a signal that the product is good.
  4. Brand names acquired at great cost might help consumers by assuring quality.

25. Suppose the state of Wyoming passes a law that increases the tax on cigarettes. As a result, smokers who live in Wyoming start purchasing their cigs in surrounding states. Which of the following principles does this best illustrate:

  1. people respond to incentives
  2. rational people think at the margin
  3. a trademark can make everyone better off
  4. markets are usually a good way to organize economic activity