Theme 3 Flashcards
What is theme 3 focused on?
The decisions that firms make
What is average revenue?
Revenue per unit, it is equal to the price and the demand curve
What is the formula for average revenue?
Total revenue / Quantity
What is the formula for total revenue?
Price x quantity
What is marginal revenue?
The change in total revenue from selling one extra unit of output, its gradient is usually twice as steep as the AR
What is a price taking business?
A price taking business is a business that has to sell at the market price - it is found in perfect competition
Why do price taking businesses have to sell at the market price?
Because they have no market power, they cannot reduce supply and charge a higher price
What is a price making business?
Companies that can sell their products above the market price because they have greater market power.
What properties make a business a price making business?
They must have greater market power; this is usually a monopoly or business with no market substitute
What is revenue maximization?
It is equal to when marginal revenue = zero (MR=0)
What is revenue synergy?
The ability to sell more products or services after a business merger
What are some examples of revenue synergies?
Two merging firms may:
- do more marketing
- sell complementary products
- sell into a new consumer base
- share distribution channels
What does a revenue schedule look like for a price taker?
Price/AR remains the same as the price is taken from the market, therefore MR also remains the same throughout. This assumes there is a perfect market, and the firms are acting rationally and cannot manipulate consumers.
What is a revenue schedule for a price maker like?
As quantity increases Price/AR decreases with output as demand falls. The total revenue increases before it peaks and begins to decline again. The MR for each increase in output decreases until MR=0 (revenue maximization) and becomes negative and firms begin to make a loss.
Where can Revenue maximisation be found on a graph?
At the point where MR = zero, at the midpoint of the downward sloping AR curve and at the highest point of the total revenue curve
Why is the classic cost curve U shaped?
Due to the law of diminishing returns.
What do firms need to do when costs start to rise again?
They need to make a long run decision when the SRAC begins to increase, creating a new SRAC curve
Where does MC pass through ATC?
At it’s lowest point as once the marginal cost increase, the ATC will also increaase
What happens to average fixed costs as output increases?
AFC decrease as output increases as the more output is occurring at the same fixed cost however, they will eventually begin to rise.
When do AVC become relevant?
When trying to find the shutdown point.
What is Normal profit?
The minimum profit needed to keep factor inputs in their current use in the long run - sustains the factors of production, Occurs when AC=AR or TC+TR
What is total revenue?
The amount of money a firm receives, being quantity sold x price
What happens to total revenue with a price taking firm?
TR increases linearly upwards as output increases as it is operating in a perfectly competitive market and must sell at the market determined price
What happens to total revenue with a price making firm?
The TR will increase with output, before starting to fall, forming a parabola because as the price is cut the TR will start to rise at a slower rate causing the shape of the curve to dip
What is Average revenue?
The revenue a firm recieves per unit sold (equal to the price and demand) calculated by TR/Quantity.
What is the AR curve like for a price taker?
Perfectly horizontal line as the price will always remain the same in the assumed perfect market
What is the AR curve like for a price maker?
Downward sloping demand curve as AR is equal to demand and the demand will fall as the price rises
What is MR?
The change in total revenue received for selling one extra unit?
What is the MR curve like for a price taker?
A perfectly horizontal line as the product is always sold at the same price so no extra revenue is produced at any point
What is the MR curve like for a price maker?
The MR curve is also downward sloping but has 2x the gradient because cutting price means less additional revenue per item sold
What is the formula for price elasticity of demand?
PED = %change in quantity demand / %change in price
How is MR affected when demand is price elastic (demand doesn’t change with an increase in price)?
Marginal revenue will be positive as a cut in price will increase total revenue. This means that demand is price elastic. a cut in price will generate revenue therfore MR will be positive
How is MR affected when demand is price inelastic (demand doesn’t change with an increase in price)?
if a firm cuts price and marginal revenue is negative (total revenue falls) it implies that demand is price elastic. A cut in price will reduce revenue therefore MR is negative.
What does MR equal when there is unitary elasticity?
MR=0 When there is unitary elasticity
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What is total cost?
Total cost = The cost of producing at a given level of output
What is the TFC?
Total fixed costs that do not change directly when there is an increase in output
What are TVC?
Costs that vary directly with output.
Write the formulas for the types of cost?
TC = TFC + TVC
TVC = TC - TFC
TFC = TC - TVC
What is average cost?
The cost per unit of output, = TC/Q
What is the marginal cost?
The cost to the firm of increasing one additional unit of output.
What is the formula for Marginal cost?
Change in total cost / change in output
What does the law of diminishing returns state?
The law of diminishing returns states that as more variables are added to fixed factors of production, the increase in output will eventually fall.
What are economies of scale?
Occur when an increase in the scale of production leads to a more than proportionate increase in output, causing a fall in the LRAC.
What are internal economies of scale?
Occurs when a firm benefits from lower LRAC as output expands
What are external economies of scale?
Occurs when a whole industry grows larger and all firms within that industry experience lower LRAC
What are 3 examples of External economies of scale?
- Improvements to transport
- When skilled labour moves to an area that has a reputation for a certain industry
- when new methods of production come about due to improving technology
What are the different types of economies of scale?
- Technical
- Managerial
- Marketing
- Commercial
- Financial
- Risk bearing
What are technical economies of scale?
Doubling the dimensions of an object increase its volume 8x, therefore a larger warehouse can hold disproportionately bigger number of workers/stocks
What are marketing economies of scale?
AS a firm grows bigger, cost of advertising is spread over a much larger number of potential customers e.g. for smaller firms advertising to a small number of people in a local newspaper is more effective.
What are commercial economies of scale?
Large firms can bulk buy from their suppliers, gaining discounts and better deals
What are managerial economies of scale?
Larger firms can bring in by employing higher skilled and more specialised managers that can increase productivity.
What are financial economies of scale?
Larger firms can issue shares on the stock market and can receive loans with lower levels of interest as they are deemed low risk by banks because they have lots of collateral.
What are risk bearing Economies of scale?
Large firms can spread risk by selling a wider range of products/ being in a wider range of industries.
What is the minimum efficiency scale?
The output at which a firms LRAC curve stops falling and begins to rise again. It can be viewed at the output at which internal economies of scale have been fully exploited
What is diseconomies of scale?
Occurs when LRAC starts to rise as output increases.
What are the 4 types of diseconomies of scale?
- X-inefficiency
- Poor communication
- Demotivation
- Poor coordination
How can X-inefficiency lead to diseconomies of scale?
AS firms increase in size costs can mean administration coasts increase disproportionately.
How can poor communication lead to diseconomies of scale?
The lines of communication between managers and employees can become complex, potentially leading to information delay or confusion with workers
How can demotivation lead to diseconomies of scale?
Large businesses tend to be more impersonal and employees feel less valued, this could lead to higher levels of absenteeism or lower staff retention, leading to reduced efficiency
How can poor coordination lead to diseconomies of scale?
Large companies can be difficult to manage as they operate with different languages, time zones and culture which could result in lower productivity.
What is profit?
The reward for risk taking - it is revenue - costs
What is profit maximisation?
When a firm cannot increase its profit, it is equal to the point where MR=MC (MR-MC=0) When the cost of making one unit is equal to the revenue of one unit.
What is normal profit?
The minimum necessary profit required to sustain the factors of production Occurs when TR=TC
What type of signal does normal profit act as?
It does not act as a signal for firms to enter the market, not does it signal for firms to leave the market
What does the size of normal profit depend on?
The level of risk involved and the other investment opportunities available
What is supernormal profit?
Any profit above the normal profit required to sustain the factors of production, it is the difference between TR-TC
What is a loss?
A loss occurs when firms TC exceed revenues (TC>TR) The average cost of production is more than the price per unit.
What is the break-even level of output?
Occurs when TC=TR, when a firms cost, and revenues are equal (they are making a normal profit)
Will a business always shut down if it is making a loss?
No, If a firm is covering its average variable costs, it will stay afloat in the long run
What is the Shutdown point?
The shutdown point is the point where TVC=AR and any price below that means the business will shut down as producing any good will result in a loss
What are the reasons a firm may keep producing if TVC>AR (the shutdown point)?
- There may be a temporary fall in demand (recession meaning demand will bounce back)
- A firm can gain access to a form of credit
- A firm may see AR return to its normal levels in the LR
Why may a firm not shut down even if AR>AVC?
The firm may be pessimistic about the growth of a particular market, and feel there is a high opportunity cost in staying in a declining market.
What is the profit maximisation position?
MC=MR
Why is MC=MR the profit maximising position?
Because it is the point before marginal revenue is exceeded by marginal costs.
What causes a change in supply?
- Productivity
- wage rises
- Energy/ production costs increasing
- Changes in exchange rates (depreciating pound means more expensive imported components and materials
- Advances in production technology
- The entry of new producers into the market
- Favorable weather
- Taxes, subsidies and regulation
What are the main Business objectives for firms?
- Profit maximisation
- Sales maximisation
- revenue maximisation
- Satisficing behaviour
- Social aims (enterprises)
What is satisficing behaviour?
Involves the owners of a business setting a minimum level of achievement in terms of revenue and profitability
What are social enterprises?
Businesses with profits that are reinvested for social aims
What are the 4 different reasons for differing business objectives?
- Managerial reasons (Revenue or sales growth instead of profit/ Satisfactory profit for shareholders)
- Information constraints (it can be hard to gain accurate info on MC and MR therefore cost-plus pricing is quite common
- Size of the business (small firms may be a ‘lifestyle business’
- State owned corporations (can have a range of social and political objectives)
How do maximisers behave?
Believe in traditional economic theory and try to make the best possible choice from the available alternatives
How do Satisficers behave?
Examine only a limited set of alternatives and choose the best of them
- they use rules of thumb rather than complex pricing strategy
- They use simple cost-plus approaches rather than maximising profit
- Satisficers may be more concerned with increasing revenue or market share instead of profit maximisation.
What formula is for profit maximising?
MC=MR
What formula is for revenue maximising?
MR=0
What formula is for sales maximising?
ATC=AR