Market structure Flashcards
Define market structure
The market environment within which firms operate
Define perfect competition
A form of market structure that produces allocative and productive efficiency in the long-run equilibrium
What is a price taker
A firm that must accept whatever price is set in the market as a whole
Allocative efficiency
achieved when consumer satisfaction is maximised. P=MC
Productive efficiency
Attained when a firm operates at minimum ATC, choosing an appropriate combination of inputs and producing the maximum output possible from those inputs. (Producing at bottom of AC)
Features of perfect competition
Profit maximisation is an objective, many buyers and sellers, homogenous product, no barriers to entry or exit, perfect knowledge, price takers
What is a homogenous product
products are seen as identical by consumers, there is no brand loyalty so all products are perfect substitutes
What is perfect knowledge
Buyers and firms know prices charged by other firms, and no firm has a superior production technique
Examples of perfect competition
agriculture, commodities, foreign currency market
What is perfect competition demand curve like
perfectly elastic. because the quantity the firm sells is small compared to the size of the market, so doesn’t influence (AR=MR)
Analysis for perfect competition diagram
The firm cannot sell above P0 because buyers have full knowledge of the market and will buy elsewhere. The firm can not sell below P0 and profit maximise (P0 is where MR=MC so firm charges at P0). To profit maximise the firm produces at Q0 because MC=MR.
Perfect competition in the short run
The firm is making SNP which attract competitors and firms enter the market with no barriers to entry. Shifts supply right, and lowers market clearing price
Perfect competition in the long run
SNP lowers to 0. If profits fell below normal profits, some firms would leave the market (no barriers to exit). Supply shifts left and market clearing price increases. This increases SNP to a level they are at 0.
Perfect competition efficiency in the short run
Allocatively efficient. Not productively efficient
Perfect competition efficiency long run
Both allocatively (P=MC) and productively efficient (Producing at minimum AC)
How can the government change the nature of perfect competition to make it more competitive
force profit maximisation as the primary objective, increase number of buyers/sellers (encourage new enterprise, subsidies/tax breaks, discourage mergers, international comp), homogenous product (enforce safety standard), no barriers to entry (access to same technology), perfect knowledge (increase consumer knowledge by providing comparison info)
Define monoply
Form of market structure in which there is only one seller of a good or service
What is perfect/first-degree price discrimination
A situation arising in a market whereby a monopoly firm is able to charge each consumer a different price
What is arbitrage
A process by which prices in two market segments will be equalised as a result of purchase and resale by market participants
What is third degree price discrimination
Firm charges different price for the same product to different market segments
What are assumptions in the monopoly model
firms aim to profit maximise, single seller of a good, no substitutes for the good (heterogenous product), has barriers to entry, imperfect knowledge (monopolist may have patent/unique knowledge so is price maker)
Examples of monoploy
Google (search), facebook, microsoft windows (operating system)
Monopoly in the short run and long run
Monopoly profit maximises (MC=MR). Q0x(P0-AC0) is total SNP. Barriers to entry are very high, new firms unable to enter so SNP is made in the long-run. Production not at bottom of AC curve not productively efficient. Not allocatively efficient as P does not equal MC
Advantages of monopoly
Can be dynamically efficient (invest SNP into R&D keeping barriers to entry high), Benefits from economies of scale (achieve lower AC than a competitive firm)
Disadvantages of monopoly
economically inefficient (allocative inefficiency means that quantity supplied to consumers is restricted, higher price and lower utility), could be x inefficient (lack of competition so less incentive can lead to lower dynamic efficiency), dynamically inefficient/lack of consumer choice (no incentive to reinvest profits)
What is x inefficiency
actual AC is above the AC curve due to lack of competitive pressure
Why a monopoly could be better than a more competitive market
Depends on objectives - state owned monopoly may seek allocative efficiency, social costs and benefits.
If a monopoly is threatened with competition it can be forced to become dynamically efficient and stll benefit from economies of scale
Why can a monopoly be worse than a more competitive market
Lack of competition can cause a monopoly be x inefficient, little innovation, charge high prices. Consumers have reduced choice and high price without benefiting frim high quality product
What conditions does price discrimination need to be under
seller is a price maker, seller can identify different groups of customers with different PED, consumer must not be able to easily resell the product to a different market segment for a higher prices
Analysis of a monopolist of first degree price discrimination
All consumer surplus becomes extra SNP because the consumers are paying the maximum that they are willing to, assumes the monopolist has perfect knowledge of the consumer’s preferences and this knowledge costs less to acquire than the extra SNP
Examples of price discrimination
houses, insurance, cinema tickets, national trust
Analysis of a monopolist with third degree price discrimination
Monopolist charges lower prices to a market segment like children/students. A high price is charged to customers like adults. This leads to consumer surplus taken from adults becoming extra SNP.
Advantages of monopolistic price discriminating
Low prices for some consumers. Increases viability of good/service (a single price may not lead to SNP and can cause the good not being provided at all)
Disadvantages of monopolistic price discrimination
High prices for some consumers - may have less to spend on other goods and have lower utility than if the market were competitive
What does price discrimination depend on
Its benefit depends on the nature of the good/service; a product with positive externalities and price discrimination means more people can afford it
What is a natural monopoly
Monopoly that arises in an industry in which there are such substantial economies of scale that only one firm is viable