3.4 Market Structures (2) Flashcards
What is economic efficiency ?
- making optimal use of scarce resources to help satisfy changing wants + needs (how well scarce resources are allocated)
What is allocative efficiency ?
- occurs when the value that consumers place on a good/service (reflected in the price they are willing and able to pay) = the cost of the factor resources used up in production
- when demand = supply ie. P (AR) = MC
What is productive efficiency ?
- occurs when firms max production + min costs ➡️ exploiting all economies of scale
- min point on AC curve (AC = MC)
- firm on their production possibility frontier
What is dynamic efficiency ?
- when businesses supplying a market successfully meets changing needs + wants over time ➡️ linked to innovation/invention
- occurs when a a firm reinvests their supernormal profits ➡️ lower unit costs
(AC curve shift downwards)
What is x-inefficiency ?
- firms being wasteful for lower costs - any point on AC curve
- a lack of real competition may give a monopolist a weak incentive to invest in new ideas or consider consumer welfare (AC increases)
What is innovation ?
putting a new idea into action ie. ‘the commercially successful exploitation of ideas’
- product innovation: changes to the characteristics + performance of a good/service
- process innovation: changes to the way production takes place/is organised OR changes in business models + pricing strategies
What is deadweight loss of welfare ?
- the loss in producer + consumer surplus due to an inefficient level of production eg. from market or govt failure
What is Pareto optimality ?
- not possible to bargain or trade in a way that everyone is at least as well off as they were before and at least one person is better off
- exists if there is both allocative efficiency + productive efficiency
What is perfect competition ?
- market structure whose assumptions are strong, therefore unlikely to exist in the
vast majority of real-world markets - some insights from studying a world of perfect competition ➡️ comparing/contrasting with imperfectly competitive markets
- eg. small bakeries in a large city, small scale wheat rowers, sporting bets, fruit seller in a big street market
Characteristics of perfect competition ?
- many sellers (highly competitive)
- identical costs
- identical/homogenous products
- no entry/exit barriers
- perfect knowledge of market (same access to info)
- firms are price takers (little/no choice in price as firms producing identical products)
- normal profits in LR (but SR loses OR supernormal profits are possible)
- profit maximisation assumed as key objective of firms + consumers assumed to maximise utility
SR profit maximisation in PC ?
- market price is set by the interaction of market S&D
- each individual firm is a price taker in a perfectly competitive market
- the ruling market price becomes the AR + MR curve for the firm
- average revenue equals marginal revenue at every level of output
- assume that the aim of each firm is to find a profit-maximising output
- can also makes losses in SR (if ruling market price is less than average costs)
When may a firm consider shutting down production (PC) ?
- in SR, a business will continue to supply products if revenue covers variable costs ie. revenue = AR x Q
- VC are costs that vary directly w/output eg. raw materials, component parts & employees paid an hourly wage
- providing that price per unit (AR) > average variable cost (AVC), then a contribution is being made to cover some fixed (overhead) cost
- as a result the firm would be better off continuing production if we assume that FC are lost if a shutdown decision is made
- but, if there is a fall in demand & price drops below AVC, then a firm might decide to shutdown production to minimise their losses
- this is because not enough revenue is being generated & total losses suffered would be
higher if production continued
LR profit maximisation in PC ?
- produce at quantity where MR = MC
- Supernormal profits in SR encourages entry of new firms into market by profit motive
- causes an outward shift in supply, forcing down the ruling market price until price = LRAC
- at this point, each firm is making normal profit where P (AR) = AC
- no further incentive for movement of firms in/out of market so LR equilibrium in established where price = AC at output where MR = MC ➡️ all firms making normal profit (P = AC)
ie. new firms enter market (no barriers) and will increase supply ➡️ price drops (profit competed away)
Economic efficiency in perfect competition ?
- ✅ allocative (both in SR & LR as price = MC)
- ✅ productive (attained in LR, output is at lowest point of AC)
- ❌ dynamic (LR no as lack of supernormal profits but SR possibly)
Why are competitive markets good for economic efficiency ?
- lower prices (many competing firms) XED will be high ➡️ consumers prepared to switch to most competitively priced products
- low barriers to entry: entry of new firms ➡️ competition + ensures prices kept low
- lower total profits + profit margins than monopoly
- greater entrepreneurial activity ➡️ for comp to be improved + sustained there needs to be genuine desire to innovate/invent to drive markets
- competition ensures firms move towards productive efficiency + avoid X-inefficiency
- threat of comp ➡️ faster rate of technological diffusion (firms need to be responsive to changing needs of consumers ie. dynamic efficiency)
Evaluating assumptions of PC model ?
- ❌ most firms have some amount of price-setting power (price makers)
- ❌ dominance in real world markets of differentiated/branded products
- ❌ highly complex products (always info gaps facing consumers)
- ❌ impossible to avoid search costs even w/spread of digital/web tech
- ❌ patents, control of intellectual property, control of key inputs all ignored by model
- ❌ rare for entry/exit to be costless
- ❌ model assumes there are no externalities - in reality often 3rd party effects of every market
Pros & cons of PC market structure ?
- ✅ consumers not exploited by firms (eg. higher prices)
- ✅ equality: products are the same (consumers able to buy the same product)
- ✅ no ‘wasted’ costs in terms of advertising etc
- ❌ consumers face lack of choice + cannot necessarily find a product that perfectly meets their needs
- ❌ firms are unlikely to be able to grown large enough to benefit of economies of scale
What is monopolistic competition ?
- form of imperfect comp, can be found in many real-world markets eg. coffee shops in busy town centre or local hairdressers
- similar to PC but more realistic as products are differentiated (means businesses have some control over their products ie. price setting power - AR curve slopes downwards)
Characteristic of Monopolistic competition ?
- imperfect comp
- large no. of sellers & buyers ➡️ concentration ratio low
- perfect info
- selling similar/differentiated products
- low barriers to entry/exit ➡️ allows firms to respond to profit signals
- firms have price making powers (downward sloping demand curve) - BUT little
- economic profit/loss in SR
- normal profits in LR
- firms aim to max profits + consumers aim to max utility
- productive + allocatively inefficient
SR profit maximising in monopolistic competition ?
- supernormal profit/loses in SR
LR profit maximising in monopolistic competition ?
- new firms attracted by SR economic profit so enter the market (no barriers to entry/exit)
- this reduces demand for original firm as some consumers buy products from new/alternative firms
- demand falls so price falls (curve becomes slightly more elastic) + MR will shift inwards
- only normal profits made in LR equilibrium ie. AR = AC
Economic efficiency in LR monopolistic competition ?
- ❌ allocatively efficient: prices above MC
- ❌ productively efficient: saturation of the market meaning businesses unable to exploit fully internal economies of scale causing LR average costs to be higher
- ✅❌ dynamic: LR no but SR possibly + associated w/extensive consumer choice & innovation but lower profit margins
- ✅ ❌ x-inefficiency
- heavy spending on marketing & advertising- wasteful & inefficient use of scarce resources ?
- social costs of packaging & negative externalities from packaging
What is an oligopoly ?
- imperfectly competitive market with a high level of market concentration (rule of thumb an oligopoly exists when the top 5 firms in market account for more than 60% of market sales ie. C5 concentration ratio > 60%)
Characteristic of an oligopoly ?
- industry dominated by few large firms
- high entry/exit barriers
- high concentration ratio
- interdependence of firms (firms affected by how other firms set prices & output) affect strategic decisions
- differentiated products (similar not identical) ie. brands
- dominant firms can enjoy economic profits (prices tend to be quite stable/often avoid price comp)
- use non-price competition
- change in ATC doesn’t necessarily change output
What is meant by concentration ratio ?
- measure the combined market share of the top ‘n’ firms int he industry
- value of ‘n’ is often 5 but may be 3 or any other small no.
- add market share of top ‘n’ firms
- 5-firm c ratio > 60% = oligopoly
What is meant by strategic interdependence ?
- oligopolies are interdependent thus strategy becomes very important ➡️ must try to anticipate rivals responses to changes in price/non-price strategies
- one firm’s output + price decisions are influenced by the likely behaviour of competition ie. decisions of one firm influences that of another
- because there are few sellers, each firm is likely to be aware of the actions of others
- causes oligopolistic industries to be at risk of tactic or explicit collusion can lead to allegations of anti-competitive behaviour
- always high level of uncertainty
What are the key decisions that oligopolies need to make ?
- whether to compete or collude with rivals
- whether to use price comp or not
- whether to leave prices alone & us non-price comp
What is non-collusive behaviour in an oligopoly ?
- firms don’t work together, instead they compete w/each other in terms of price/non-price comp
- all business behaviour in oligopolies is strategic + will depend on the key objective of the business (maintaining a satisfactory rate of profitability, protecting market share, growing user base, reacting to decisions of rivals)
Non-price competition in an oligopoly ?
key aspect in oligopoly especially when prices are rigid between competing suppliers
- better quality customer service eg. good after sales service
- long opening hours eg. 24/7
- discounts of product upgrades
- developing brand loyalty through advertising or promotions (reduces XED + allows firms to charge higher prices)
- exclusivity/loyalty schemes
- advertising + branding
- innovation
- environmental impact (ethical?)
- variation in design, style, service, quality of product
- contractual relationship w/suppliers eg. apple has singed exclusive distribution agreements (O2 for the iphone - gives apple 10% of sales from phone calls + data transfers)
Why is branding important for oligopolies ?
- significant feature of non-collusive comp, especially in oligopoly where building + maintaining market share is often a dominant business objective