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ECON 101 Lecture Notes - Lecture 19: Market Power, Natural Monopoly, Deadweight Loss

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salmonkoala862
1 Apr 2017
School
U of M
Department
Economics
Course
ECON 101
Professor
Ronald C Caldwell

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ECON 101 Full Course Notes
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ECON 101 Full Course Notes
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Document Summary

If demand curve is linear, then marginal revenue curve will be linear. Marginal revenue curve will intersect horizontal axis exactly halfway between the origin and where the demand curve intersects the horizontal axis. As we move down the demand curve the total revenue is rising. After a certain point it starts to go back down. The price elasticity of demand changes along the demand curve. The halfway point of the demand curve is unit elastic. Demand is elastic before the halfway point: a lower price increases total revenue. Quantity effect is larger in magnitude than the price effect. Demand is inelastic after the halfway point: a lower price decreases total revenue. Price effect is larger in magnitude than the quantity effect. Marginal revenue will be zero where total revenue is maximized. If demand for a good is elastic. The quantity effect will dominate the price effect. A decrease in price will increase total revenue.

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Related Questions

A. A competitive firm

  1. can consider only its location in setting the price.
  2. must base its competitive price on product differentiation.
  3. has the ability to set its own price.
  4. must accept the price determined by the intersection of the market supply and demand curves.
  5. has no supply curve.

B. If a firm is making an economic profit, then

  1. the factors of production are being paid their opportunity costs.
  2. there will be no change in the number of firms if the industry is perfectly competitive.
  3. the factors of production are being paid less than their opportunity costs.
  4. the factors of production are being paid more than their opportunity costs.
  5. the firm will exit the industry

C. Along a downward-sloping monopoly demand curve,

  1. marginal revenue is greater than price.
  2. the elasticity of demand is constant.
  3. marginal revenue decreases when the price decreases.
  4. marginal revenue is equal to zero when the price is equal to zero

D. If, in the short run, a perfectly competitive firm is producing at a point where the total cost is greater than total revenue, then the firm should

  1. shut down because economic profits are negative.
  2. continue to produce as long as P > AVC.
  3. continue to produce because accounting profits are positive.
  4. set a higher price for its output.
  5. set a lower price for its output

E. For a perfectly competitive firm, the demand curve is

  1. the marginal revenue curve.
  2. perfectly inelastic.
  3. always equal to marginal cost.
  4. the same as the market demand curve

F. A firm in a(n) industry will have the most elastic demand curve

  1. monopolistic
  2. oligopolistic
  3. monopolistically competitive
  4. perfectly competitive

G. If the demand curve of a monopolist is in the inelastic range, then

  1. total revenue will fall if the price increases.
  2. total revenue will be unchanged if the price increases.
  3. total revenue will rise if the price increases.
  4. the total supply will increase by an equal amount if demand increases.
  5. the price will be unchanged if total revenue increases

H. Monopolistic competition and oligopoly are examples of

  1. monopoly.
  2. perfect competition.
  3. theories of consumer behavior.
  4. imperfect competition.
  5. the extreme cases on the market structure continuum

I. Under which market structure do firms face the flattest (most elastic) demand curve?

  1. perfect competition
  2. monopolistic competition
  3. oligopoly
  4. monopoly

J. At the point of long-run equilibrium for a perfectly competitive firm,

  1. economic profits are zero.
  2. TR > TC.
  3. TR < TC.
  4. P = AVC.
  5. normal profits are zero.

interval (or arc) elasticity

cross-price elasticity

price elasticity of demand

elastic demand

income elasticity

inelastic demand

inframarginal units

marginal revenue

point elasticity

price effect

quantity effect

total revenue

unitary elastic demand

1. __________________ A measure of consumers’ sensitivity or responsiveness to changes in the price of a good or service.

2. ___________________ When the percentage change in price (in absolute value) is more than the percentage change in quantity demanded (in absolute value).

3. ___________________ When the percentage change in quantity demanded (in absolute value) is more than the percentage change in price (in absolute value).

4. ___________________ When the percentage change in quantity demanded (in absolute value) is just equal to the percentage change in price (in absolute value).

5. ___________________ Total amount paid to a producer for a good or service P * Q.

6. ___________________ The effect on total revenue of a change in price, holding quantity constant.

7. ___________________ The effect on total revenue of a change in quantity, holding price constant.

8. ___________________ An elasticity calculated over an interval of a demand curve or demand schedule.

9. ___________________ Elasticity at a specific price or point on a demand curve.

10. ___________________ A measure of how responsive quantity demanded is to a change in income, all other things constant.

11. ___________________ A measure showing how responsive the quantity demanded of one good is to changes in the price of another good, other factors constant.

12. ___________________ The additional revenue received by producing and selling one more unit of output.

13. ___________________ Units of output that could have been sold at a higher price had the firm not lowered its price to sell additional (marginal) units.

1. The addition to the revenue obtained from firing an additional unit of labour is:

a. marginal revenue product

b. marginal physical product of labour

c.total product

d. marginal factor cost

2. The firm's demand curve for labour is:

a. the demand curve for the good produced divided by the price of the good

b.the marginal revenue product curve for labour

c.the marginal physical product curve for labour divided by the good

d. the marginal physical product curve for labour multiplied by the price of labour

3. If the price of the product is $1.50 and the marginal factor cost of an additional unit of input is $105, how many units of labour should be hired?

Labor input (workers/day)_______________________________-total physical product (output/day)

10 __________________________________________________500

11__________________________________________________600

12__________________________________________________690

13___________________________________________________760

14___________________________________________________800

a. 14

b.12

c.13

d.11

4. the price elasticity of demand for labour equals

a. the change in quantity demanded of labour divided by the change in the price of labour

b. the slope of the demand curve for labour

c. the percentage change in the price of labour divided by the percentage change in the supply of labour

d. the per cent change in the quantity demanded of labour divided by the percentage change in the price of labour

5. We would expect that a rise in labour supply will have a proportionately larger effect on the market wage rate when:

a. the supply for labour is elastic

b.the demand for labour is unitary elastic

c.the demand for labour is elastic

d.the demand for labour is inelastic