promos book 2 Flashcards
Limits for profit max theory (2)
- lack sufficient or accurate info about demand cost conditions that exist
- cost of obtaining the info is high in terms of time and resources
Alternative objectives of firms
- revenue maximisation
- especially for sales managers etc. who are dependent on commissions for their salary - profit satisficing
- minimum acceptable levels of profit
- to pursue alternate interests
- reduce impact on society or the environment - market share dominance
- because bigger companies attract better talent
- gains and losses also correlate with stock performance
- done through entry deterrence or predatory pricing
Difference in factors in long run and short run
Short run
- time period during which at least ONE factor of production if fixed
- output can only increase using more variable factors
Long run
- time period long enough for all inputs to be varied except the level of tech
-
LDMR
Law of diminishing marginal returns
- as more units of a variable factor are applied to a given quantity of a fixed factor, there comes a point beyond which the additional output from additional units of the variable factors employed will eventually diminish
Short run costs (fixed and variable)
Fixed: Costs that does not vary with output level and must be paid even when production does not take place
Variable: Costs that varies with output level and is not incurred when production does not take place
Draw short run cost curve
graph 1
Long run average cost curve (LRAC)
graph 2
Explain LRAC
as output rises, average costs fall initially due to IEOS
when long run average cost is at a minimum, the firm has reached its MES where no additional IEOS can be achieved
as output rises further, average costs increases due to IDOS
Types of IEOS
Technical
- Factor indivisibility
- purchase of machinery that can significantly improve output and reduce average costs of production
- but are only bought by large firms that can spread the equipment costs over a larger output - Law of increase dimensions
- output increased by a greater extent that the cost od producing the container (eg. shipping containers)
- lower unit costs of production - Specialisation and division of labour
- workers assigned to more specific and repetitive jobs so less training is needed
- workers also become significantly more efficient at their own job and this results in higher output per worker
- lowers unit cost of production for the firm
Financial
- bigger firms are given lower interest rates and larger loans because of better credit scores and greater collateral
- riskier to lend to SMEs so they have higher interest rates
Marketing
- preferential treatment by suppliers because they buy raw materials and components in bulk
- bulk advertising
Types of IDOS
- High cost of monitoring and management
- larger firms face communication issues and the flow of info between departments become less efficient
- monitoring costs (eg. standardisation of menus across all outlets) increases
- time lags in info
- incur more costs to make changes faster - Low morale of employees
- relationships become impersonal and there is a sense of alienation
- cause fall in productivity and higher costs
Types of EEOS
- Economies of information
- sharing of R&D knowledge or facilities
- share cost saving technologies
- improve the productivity of indiv firms and reduce average costs - Economies of concentration
- clustering of businesses in a distinct geographical location
- increases availability of skilled labour as special educational institutes can be set up there and those regions also attract talent for firms so they can reduce labour search costs
- well developed infrastructure
Types of EDOS
- Increased strain on infrastructure (eg. congestion)
- Shortage of industry specific resources
- growth of industry causes a shortage of specific raw materials or skilled labour, pushing up prices for them
What affects size of firms (7)
- Reach MES at very low levels of output relative to market output
- When production process is broken up into separate processes with separate firms
- performing small part of the whole task will incur lower unit costs - Saucer shaped LRAC
- small and large firms can coexist because they can be equally cost efficient (constant unit cost over a wide range of output) - Banding and joint ventures
- engage in joint ventures/band tgt to get advantages of bulk buying (can enjoy EOS even as a small firm) - Nature of product
- personalisation, each product needs individual attention, hard to mass produce
- large firms focus on mass produced goods and smaller firms focus on niche markets
- for niche markets, even though there isnt a lot of IEOS, can set high price to cover high costs as it is less price inelastic in demand - geographical factors
- transport costs etc
- fresh produce will only ship within country - business unwilling to take risks
- alternative objects of firms
- eg. profit satisficing
Characteristics of PC
- Large number of small firms relative to market size
- no significant share of the total market output - Product is homogenous
- all products are identical and perfect substitutes - Barriers to entry and exit are absent
- no restrictions when they enter the market - Information is perfect
- producers know the prices of all available goods and services, production tech etc
- buyers know everything about each sellers price, quality and availability of the products - No influence over price (price taker)
- has to sell at market prevailing price
- If PC sell above market price, Qd will fall to 0
- no incentive to lower price as it can sell all it wants at current price - Only normal profits in long run
- supernormal profits eroded by entry of new firms due to absence of BTE
Draw PC diagram and explain
- demand is perfectly price elastic as it is a price taker
- average revenue = price
graph 3
Shut down condition
In short run, firms can only reduce the variable costs to zero by stopping production but not fixed costs by shutting down
Only need to consider its total revenue and total variable costs
If total revenue is less than the total variable costs, shut down
If total revenue is greater than total variable costs, can offset some fixed costs and should continue production
Draw graph for shut down condition (one for shut down and one for continue operating)
Graph 4
Adjustment from short run to long run (supernormal to normal)
Graph 5
Characteristics of Monopoly
- Firm is the only seller of a good or service
- MES is large relative to market size, can only accommodate one firm - Highly differentiated products
- no close substitutes
- PED is low (inelastic) - Barriers to entry and exit are complete, supernormal profits
- High BTE (strategic and statutory) - Info is imperfect
- consumers not fully aware of quality of good, production method and prices of rivals
- firms are unaware of each others costs/methods of production - High price setting ability
- No fear of rivals reactions hence acts independently on price or output
Barriers to entry (Strategic) (6)
–> moves to keep potential firms out of the market
Strategic:
- Advertising
- help to boost demand for its products and persuade consumers that there are no close substitutes for its product
- deepen customer loyalty and increase perceived switching costs
- deters entry of new firms as they will struggle to match the same level of advertising - Gaining control of raw materials
- owning a significant portion of the key resource so new firms wont have access to the raw materials - Hostile takeovers and acquisitions
- dominant company buying up a rival firm or a stake in a rival firm
- deter entry of firms as they fear being bought over - R&D
- processes to introduce new/improved products and services
- use past supernormal profits to finance it
- improve production processes to lower average and marginal costs
- new firms dont have the financial capacity to match the product development - Limit pricing
- charge price lower than the profit maximising price but above average cost
- new firms operate on a smaller scale and incur a higher long run unit cost of production (cant match price without suffering a loss) - Predatory pricing
- setting very low prices below profit maximising levels of output and below rivals AVC
- will result in significant losses for both under assumption that losses made now can be offset by future gains in the form of higher market power and profitability arising from less competition
Statutory barriers to entry
–> by force of law (legal protection)
Natural barriers to entry
- Patents and copyrights prevents competitors from copying existing products
- Capacity expansion
- incumbent can exploit IEOS more, and is more cost efficient
- deters firms that are likely to operate on a smaller scale and incur a higher unit cost of production, making them unable to match the prices offered by the incumbent without incurring losses - Natural monopoly
- market demand is only large enough to support only one firm operating near MES
- very high overhead costs - Barriers to exit
- risk of huge losses if these firms decide to leave a market
Output decisions of a profit max monopolist (explain + long run)
Natural monopoly
- no need to fear reactions of rivals
- set where MC = MR
- if produce more, MC > MR, reducing profits
- if produce less, MR > MC, missing out on profits
- same as PC for shut down condition
- can retain supernormal profits in the long run by erecting high BTE
For natural monopoly,
- LRAC curve falls over the entire market demand, resulting in a very large MES relative to market demand (eg. electricity supplier)
MPC Characteristics
- relatively large number of small firms
- each firm has relatively small share of the total market
- ability to set price above its marginal cost is limited - sell similar but differentiated products
- real physical differences (quality, quantity)
- imaginary differences (design, packaging, branding) - barriers to entry and exit are low
- relatively low start up costs, relatively easy to copy tech, mobile factors of production
- each firm reaches MES at a very low output and hence there are many firms and it is very competitive - info is imperfect
- rivals dont have complete information regarding all prices etc
- sellers have imperfect info regarding production methods - low price setting ability
- very price elastic demand due to large number of close subs - firms set price independently
- do not need to worry about the reactions of the rivals due to their relatively small market share
- no one firms actions directly affects the action sof the other firms
- when a firm lowers its price, the extent to which each rival firm suffers is negligible (no need to consider the possible reactions of rival firms) - collusion is impossible
- cant coordinate because all products are slightly differentiated - only make normal profits
- potential entrants can easily enter the market and erode supernormal profits
- cannot invest a lot in R&D so products are only slightly differentiated
- very small scale advertising
Pricing decision of MPC (adjustment from SR supernormal to LR normal profits)
draw graph
graph 6
- initially supernormal profits
- new firms enter easily (low BTE)
- demand facing a firm decreases and becomes more price elastic since more substitutes are available due to entry of new firms
- profit max output and price decreases
- firms continue to enter till supernormal profits are eroded
- firms only earn normal profits in the long run