ECO101H1 Lecture Notes - Perfect Competition, Demand Curve, Market Price

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3. 2 firm"s mc curve = firm"s ss curve (if p > avc) Marker ss = sum of firms" ss = sum of firms" mc. In order to identify the level of output the firm will choose in the perfectly competitive industry. Simply needs to know: what is the market price. Mr = mc => q* is profit-maximizing level of output. Price is clearly greater than marginal cost, additional revenue would exceed additional cost. continue to expand output: level of profits, entry and exit. In order to answer this question, diagram will become more complicated. Tr > tc => your earning economic profits => tr/q > tc/q <=> Tr = tc => breakeven <=> p=atc. Tr loss => tr/q < tc/q <=> p

Related Questions

NUMBER 3.

You have the follwoing information for a firm:

TR = 200 Q â Q² MR = 200 â 2 Q

TC = 1000 - 8 Q + Q² MC = - 8 + 2 Q

a. If the firm produces 60 units of output, what are profits or losses for this firm.

b. Is the firm maximizing profits producing Q = 60? If not, what is the profit maximizing

level of output produced?

c. What are maximum profits?

NUMBER 4.

A firm is currently producing 80 units of output. At this level of output produced, P = 150 and ATC = 120. Also asume that MC = 130 and MR is constant at all output levels and equal to 150.

a. Is this firm making profits? If so, what are these profits?

b. Is this firm maximizing profits? If not, what would you recommend this firm do to

maximize profits? Why?

PROFIT MAXIMIZATION

Reminders:

Q: Quantity, TC: Total Costs, VC: Variable Costs, MC: Marginal Costs, MR: Marginal Revenue, TR: Total Revenue

1. Suppose the market for DVD movies is perfectly competitive. The industry price for the movies is $24, and a typical firm has the following total cost data:

Q	TC	VC	MC	MR	TR	Net Profit
0	10
1	33
2	53
3	70
4	90
5	114
6	143

a. Calculate the TR, MR, and MC for each level of output.

b. What condition must be met for the firm to maximize profits? What is the profit maximizing level of output and price for this firm? How much profit would be made?

2. Now suppose that some firms have been able to differentiate their DVDs, and the market has become monopolistically competitive. A typical firm now has the following demand schedule and total cost data:

Q	P	TC	VC	MC	MR	TR	Net Profit
0	40	8
1	35	20
2	30	28
3	25	40
4	20	56
5	15	76
6	10	100

a. Calculate the TR, MR, and MC for each level of output.

b. What condition must be met for the firm to maximize profits? What is the profit maximizing level of output and price for this firm? How much profit would be made?

QUESTION 22

For a perfectly competitive firm, profit maximization (or loss minimization) occurs at the level of output at which

	a.	MR = MC.
	b.	MR = AVC.
	c.	P = ATC.
	d.	MR = ATC.

4 points

QUESTION 23

If MR > MC, then

	a.	profits are being maximized.
	b.	the firm is producing too much of the good to be maximizing profits.
	c.	the firm can increase its profits (or minimize its losses) by increasing output.
	d.	the firm must be incurring losses.

4 points

QUESTION 24

If firms are earning zero economic profits, they must be producing at an output level at which

	a.	price minus marginal cost.
	b.	total revenue equals total costs, in other words, normal profits.
	c.	price equals average variable cost.
	d.	marginal revenue equals marginal cost.
	e.	none of the above

4 points

QUESTION 25

In the theory of perfect competition,

	a.	the market demand curve is horizontal.
	b.	the single firm faces a horizontal demand curve.
	c.	the single firm faces a downward-sloping demand curve.
	d.	the market demand curve is downward sloping.
	e.	b and d

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ECO101H1 Lecture Notes - Perfect Competition, Demand Curve, Market Price

ECO101H1 Full Course Notes

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