Micro Theme 3 Flashcards
(224 cards)
What is total revenue?
The revenue received from the sale of a given level of output
P * Q
What is average revenue?
- Average receipt per unit, the price each unit is sold for
- AR curve is the firms demand curve
- AR = Price = Demand
- Total revenue / quantity
What is marginal revenue
- the extra revenue a firm earns from the sale of one extra unit
Change in revenue / change in quantity
What does it mean when MR = 0?
Total revenue is maximised
Where does MR = 0 occur?
- directly below the midpoint of AR curve
- middle of the demand curve
- PED = 1
What does it mean when a firm is a price taker?
- a market participant that is not able to dictate the prices in a market
What does it mean when a firm is a price maker?
- firm has some degree of market power to set its prices within the market
- found in any imperfectly competitive market structure
What does the AR curve look like in price-takers?
- Horizontal
- price received for the good is constant because the good is perfectly elastic
Why is the AR curve downward sloping?
- price per unit is reduced as extra units are sold
- law of diminishing marginal utility
What is total cost?
- how much it costs to produce a given level of output
- total costs = total variable costs + total fixed costs
What are total fixed costs?
- occur in the short run
- fixed costs do not vary with output
- indirect cost
What are total variable costs
- Occur in the long run
- variable costs change with output
- all factor inputs can change
- direct cost
How to calculate ATC?
Total costs/quantity produced
ATC = AVC+AFC
How to calculate average fixed/variable costs
Total fixed/variable costs / quantity
What is marginal cost?
- How much it costs to produce one extra unit of output
- Change in TC/Change in Q
What is the effect on MC and AC when a firms total variable costs increase?
- both curves shift upwards
What is the effect on MC and AC when a firms total fixed costs increase?
- No effect on MC
- only AC shifts upwards
What is the law of diminishing marginal productivity?
- adding more units of a variable input to a fixed input increases output at first
- after a certain number of inputs are added marginal increase of output becomes constant
- then marginal increase in output starts to fall
Marginal costs rise with…
Increasing diminishing returns
Describe the trend in the cost curves as output increases
- MC, ATC and AVC rise with diminishing returns
- AFC falls with increasing output
What is the lowest point on the cost curves (apart from AFC) representative of?
The point where diminishing marginal productivity sets in
Why does the average variable cost curves tend towards the average total cost curve as output increases?
- because average fixed costs becomes increasingly small in comparison
What is the LRAC curve?
Why does the MC curve slope upwards
Each additional until requires more effort to produce than the previous one