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ECON 310 Lecture 6: l310x6

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taupeserval94
10 May 2017
School
CSULB
Department
Economics
Course
ECON 310
Professor
E Funkhouser

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Document Summary

Lecture 6 -- supply function of a competitive firm: introduction. Equilibrium price is determined by market supply and demand. Individual firms take the market price as exogenous. An individual firm can sell as much as it wants at the market price. Key idea == the demand curve faced by an individual firm is perfectly elastic at the equilibrium price. Marginal revenue == additional revenue received from selling last unit of output. Since, for a competitive firms, all units of output sold are sold at the equilibrium price, marginal revenue is the price. Short-run == firm has fixed costs that have already been paid. This means that the firm will lose the fixed cost even if it decides not to produce anything. Key idea == firm will produce if total variable cost is less than total revenue. Another way of saying this is that the firm will produce if average variable cost is less than the price.

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Related Questions

Assume a perfectly competitive firm is in long-run equilibrium and there is a decrease in market demand for the firm's output. Which of the following will occur


a. Existing firms will maintain the original level of output, but they will shift their cost functions down in the short run.

b. Market price will be above its original level.

c. Existing firms will reduce output in the short run.

d. Existing firms will raise price to cover the reduction inquantity demanded and maintain total revenue in the shortrun.

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

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

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

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

J.Ā 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.

A firm is producing where its marginal costs are at the lowest level. What can one most likely infer from this? a. there is either lost opportunity for further profits by producing more, or the firm should shut-down if it is competitive and price is at that low level. b. It is a price-taker who is producing too much. c. It is a monopolist who is producing the socially optimal quantity. d. The firm is producing rationally.

6. A single-price monopolist sets price a. where MR=demand. b. where supply=demand c. from the demand curve at the quantity for which MC=MR. d. where MR=MC.

7. Assume that the Law of Diminishing Marginal Product applies at the current output level of a competitive firm. The price is $20 and, at the current output level, marginal cost is $16 and average total cost is $20. To maximize profits the firm should: a. produce the current output level, since average revenue (price) = average cost. b. produce more since marginal revenue exceeds marginal cost at current output. c. produce less since marginal revenue is always below average revenue. d. any of the above is possible, without further information.

8. Which of the following statements is true? (i) When a competitive firm sells an additional unit of output, its revenue increases by an amount less than the price. (ii) When a monopoly firm sells an additional unit of output, its revenue increases by an amount less than the price. (iii) Average revenue is the same as price for both competitive and monopoly firms. a. (i) only b. (iii) only c. (i) and (ii) d. (ii) and (iii)

9. If a firm in a competitive market triples the number of units of output sold, then total revenue will a. more than triple. b. less than triple. c. exactly triple. d. All of the above are potentially true.

10. When a competitive firm makes a decision to shut down, it is most likely that a. marginal cost is above average variable cost. b. marginal cost is above average total cost. c. price is below the minimum of average variable cost. d. fixed costs exceed variable costs.