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Marketstructure

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  • 1. http://www.bized.co.ukMarket Structure Copyright 2006 – Biz/ed
  • 2. http://www.bized.co.uk Market Structure• Market structure – identifies how a market is made up in terms of: – The number of firms in the industry – The nature of the product produced – The degree of monopoly power each firm has – The degree to which the firm can influence price – Profit levels – Firms’ behaviour – pricing strategies, non-price competition, output levels – The extent of barriers to entry – The impact on efficiency Copyright 2006 – Biz/ed
  • 3. http://www.bized.co.uk Market Structure Perfect PureCompetition Monopoly More competitive (fewer imperfections) Copyright 2006 – Biz/ed
  • 4. http://www.bized.co.uk Market Structure Perfect PureCompetition Monopoly Less competitive (greater degree of imperfection) Copyright 2006 – Biz/ed
  • 5. http://www.bized.co.uk Market Structure Pure Perfect MonopolyCompetition Monopolistic Competition Oligopoly Duopoly Monopoly The further right on the scale, the greater the degree of monopoly power exercised by the firm. Copyright 2006 – Biz/ed
  • 6. http://www.bized.co.uk Market Structure• Importance:• Degree of competition affects the consumer – will it benefit the consumer or not?• Impacts on the performance and behaviour of the company/companies involved Copyright 2006 – Biz/ed
  • 7. http://www.bized.co.uk Market Structure• Models – a word of warning! – Market structure deals with a number of economic ‘models’ – These models are a representation of reality to help us to understand what may be happening in real life – There are extremes to the model that are unlikely to occur in reality – They still have value as they enable us to draw comparisons and contrasts with what is observed in reality – Models help therefore in analysing and evaluating – they offer a benchmark Copyright 2006 – Biz/ed
  • 8. http://www.bized.co.uk Market Structure• Characteristics of each model: – Number and size of firms that make up the industry – Control over price or output – Freedom of entry and exit from the industry – Nature of the product – degree of homogeneity (similarity) of the products in the industry (extent to which products can be regarded as substitutes for each other) – Diagrammatic representation – the shape of the demand curve, etc. Copyright 2006 – Biz/ed
  • 9. http://www.bized.co.uk Market StructureCharacteristics: Look at these everyday products – what type ofmarket structure are the producers of these products operatingin? Electric Remember to think about the Guitar – nature of the Jazz Body Vodka product, entry and exit, behaviour of the firms, number and size of the firms in the Mercedes CLK Coupe industry. You might even have to ask what Canon SLR Camera Bananas the industry is?? Copyright 2006 – Biz/ed
  • 10. http://www.bized.co.uk Perfect Competition• One extreme of the market structure spectrum• Characteristics: – Large number of firms – Products are homogenous (identical) – consumer has no reason to express a preference for any firm – Freedom of entry and exit into and out of the industry – Firms are price takers – have no control over the price they charge for their product – Each producer supplies a very small proportion of total industry output – Consumers and producers have perfect knowledge about the market Copyright 2006 – Biz/ed
  • 11. http://www.bized.co.uk Perfect Competition Diagrammatic representation GivenThe industrycost ofis the Thethis assumption offirm AtThe MC is the price profit the output the average cost curve is maximisation,– shaped curve. standard ‘U’ additional demand producing theby the determined firm producesCost/Revenue at an cuts the AC of MC =profit. is(marginal) units of output. It making normalatMR MC MC and supply curve industry output where the its (Q1). asis whole. levelfirm law of This at firstbecause thea is a lowest point long run the falls a a (due to of This output The is fraction of small supplier within mathematicaltotal industry rises diminishing relationship very the returns) then equilibrium position. supply. industry and has no between marginal and average asthe output rises. AC values. control over price. They will sell each extra unit for the same price. Price therefore = MR and AR P = MR = AR Q1 Output/Sales Copyright 2006 – Biz/ed
  • 12. http://www.bized.co.uk Perfect Competition Diagrammatic representation Because the model assumes perfect knowledge,MC firm Nowlower ACa firm the would Average and Marginal costs The assume and makesCost/Revenue MC could that advantage now to a gains theexpected is for only imply form of firm to be some be the modification lower timeprice, inothers copy short but before profit earning abnormal the short its product or gains some MC1 run,ideacost advantage (say a the remains the same. to the form of or are attracted the (AR>AC) represented by industry by the existence of grey area. new production method). AC abnormal profit. If new firms What would happen? enter the industry, supply will increase, price will fall and the AC1 firm will be left making normal profit once again. P = MR = AR Abnormal profit AC1 P1 = MR1 = AR1 Q1 Q2 Output/Sales Copyright 2006 – Biz/ed
  • 13. http://www.bized.co.uk Monopolistic or Imperfect Competition• Where the conditions of perfect competition do not hold, ‘imperfect competition’ will exist• Varying degrees of imperfection give rise to varying market structures• Monopolistic competition is one of these – not to be confused with monopoly! Copyright 2006 – Biz/ed
  • 14. http://www.bized.co.uk Monopolistic or Imperfect Competition• Characteristics: – Large number of firms in the industry – May have some element of control over price due to the fact that they are able to differentiate their product in some way from their rivals – products are therefore close, but not perfect, substitutes – Entry and exit from the industry is relatively easy – few barriers to entry and exit – Consumer and producer knowledge imperfect Copyright 2006 – Biz/ed
  • 15. http://www.bized.co.uk Monopolistic or Imperfect Competition Implications for the diagram: MCCost/Revenue This is demandrunand facing We assume that theQ1 and IfThe firm produces firm Marginal Cost equilibrium the a short curve Since the additional produceswillfirmdownward sells firm where willabeMC the each a be MR = the Average Cost in position forreceived£1.00 on revenue unit for from (profit maximising output). average shape. falls, (on each unit sold However, same and the cost monopolistic market the sloping with represents At because lies products MR curve the from being this output level, AR>AC structure. earnedunder sales. average) for each unitthe the AR AC and the firm makes in 40p x are differentiated 60p, curve. will make AR the firm abnormal profit (the grey Q1 in abnormal profit. will£1.00 some way, the firm shadedbe able to sell extra only area). output by lowering Abnormal Profit price.£0.60 MR D (AR) Q1 Output / Sales Copyright 2006 – Biz/ed
  • 16. http://www.bized.co.uk Monopolistic or Imperfect Competition Implications for the diagram: MC Because there is relativeCost/Revenue freedom of entry and exit into the market, new firms will enter AC encouraged by the existence of abnormal profits. New entrants will increase supply causing price to fall. As price falls, the AR and MR curves shift inwards as revenue from each sale is now less. AR1 D (AR) MR1 MR Q1 Output / Sales Copyright 2006 – Biz/ed
  • 17. http://www.bized.co.uk Monopolistic or Imperfect Competition Implications for the diagram: MC Notice that the existence Cost/Revenue of more substitutes makes the new AR (D) curve more price elastic. The AC firm reduces output to a point where MC = MR (Q2). At this output AR = AC and the firm will makeAR = AC normal profit. AR1 D (AR) MR1 MR Q2 Q1 Output / Sales Copyright 2006 – Biz/ed
  • 18. http://www.bized.co.uk Monopolistic or Imperfect Competition Implications for the diagram: MC This is the long run Cost/Revenue equilibrium position of a firm in monopolistic competition. ACAR = AC AR1 MR1 Q2 Output / Sales Copyright 2006 – Biz/ed
  • 19. http://www.bized.co.uk Monopolistic or Imperfect Competition• Some important points about monopolistic competition: – May reflect a wide range of markets – Not just one point on a scale – reflects many degrees of ‘imperfection’ – Examples? Copyright 2006 – Biz/ed
  • 20. http://www.bized.co.uk Monopolistic or Imperfect Competition• Restaurants• Plumbers/electricians/local builders• Solicitors• Private schools• Plant hire firms• Insurance brokers• Health clubs• Hairdressers• Funeral directors• Estate agents• Damp proofing control firms Copyright 2006 – Biz/ed
  • 21. http://www.bized.co.uk Monopolistic or Imperfect Competition• In each case there are many firms in the industry• Each can try to differentiate its product in some way• Entry and exit to the industry is relatively free• Consumers and producers do not have perfect knowledge of the market – the market may indeed be relatively localised. Can you imagine trying to search out the details, prices, reliability, quality of service, etc for every plumber in the UK in the event of an emergency?? Copyright 2006 – Biz/ed
  • 22. http://www.bized.co.uk Oligopoly• Competition between the few – May be a large number of firms in the industry but the industry is dominated by a small number of very large producers• Concentration Ratio – the proportion of total market sales (share) held by the top 3,4,5, etc firms: – A 4 firm concentration ratio of 75% means the top 4 firms account for 75% of all the sales in the industry Copyright 2006 – Biz/ed
  • 23. http://www.bized.co.uk Oligopoly• Example: The music industry has a 5-firm concentration ratio of 75%.• Music sales – Independents make up 25% of the market but there could be many thousands of firms that make up this ‘independents’ group. An oligopolistic market structure therefore may have many firms in the industry but it is dominated by a few large sellers.Market Share of the Music Industry 2002. Source IFPI: http://www.ifpi.org/site-content/press/20030909.html Copyright 2006 – Biz/ed
  • 24. http://www.bized.co.uk Oligopoly• Features of an oligopolistic market structure: – Price may be relatively stable across the industry – kinked demand curve? – Potential for collusion – Behaviour of firms affected by what they believe their rivals might do – interdependence of firms – Goods could be homogenous or highly differentiated – Branding and brand loyalty may be a potent source of competitive advantage – Non-price competition may be prevalent – Game theory can be used to explain some behaviour – AC curve may be saucer shaped – minimum efficient scale could occur over large range of output – High barriers to entry Copyright 2006 – Biz/ed
  • 25. http://www.bized.co.uk OligopolyPrice The kinked demand curve - an explanation for price stability? The firm therefore, effectively faces IfThe principle of is charging demand Assume the firm to lower its price to of the firm seeks the kinked a price a ‘kinked demand curve’ forcing it gain acurve rests an output of its to £5 andcompetitiveon the principle rivals producing advantage, 100. maintain stable or rigid it makes will followasuit. Any gains pricing will that: If it chose to raise price above £5, its structure. lost and the % change quickly beOligopolistic firms may in rivals would not follow suit andits firm a. If a firm raises its price, the overcome this smaller than the % demand will beby engaging in non- effectively facesnot follow suit rivals will an elastic demand price competition. reduction in price – total revenue curve for its product (consumers would would If a firm lowers its price, its b. again fall as the firm now faces buy from the cheaper rivals). The % £5 a relatively inelastic demand curve. rivals will all do the same change in demand would be greater than the % change in price and TR Total would fall. Revenue B Total Revenue A D = elastic Total Revenue B Kinked D Curve D = Inelastic 100 Quantity Copyright 2006 – Biz/ed
  • 26. http://www.bized.co.uk Duopoly• Market structure where the industry is dominated by two large producers – Collusion may be a possible feature – Price leadership by the larger of the two firms may exist – the smaller firm follows the price lead of the larger one – Highly interdependent – High barriers to entry – Cournot Model – French economist – analysed duopoly – suggested long run equilibrium would see equal market share and normal profit made – In reality, local duopolies may exist Copyright 2006 – Biz/ed
  • 27. http://www.bized.co.uk Monopoly• Pure monopoly – where only one producer exists in the industry• In reality, rarely exists – always some form of substitute available!• Monopoly exists, therefore, where one firm dominates the market• Firms may be investigated for examples of monopoly power when market share exceeds 25%• Use term ‘monopoly power’ with care! Copyright 2006 – Biz/ed
  • 28. http://www.bized.co.uk Monopoly• Monopoly power – refers to cases where firms influence the market in some way through their behaviour – determined by the degree of concentration in the industry – Influencing prices – Influencing output – Erecting barriers to entry – Pricing strategies to prevent or stifle competition – May not pursue profit maximisation – encourages unwanted entrants to the market – Sometimes seen as a case of market failure Copyright 2006 – Biz/ed
  • 29. http://www.bized.co.uk Monopoly• Origins of monopoly: – Through growth of the firm – Through amalgamation, merger or takeover – Through acquiring patent or license – Through legal means – Royal charter, nationalisation, wholly owned plc Copyright 2006 – Biz/ed
  • 30. http://www.bized.co.uk Monopoly• Summary of characteristics of firms exercising monopoly power: – Price – could be deemed too high, may be set to destroy competition (destroyer or predatory pricing), price discrimination possible. – Efficiency – could be inefficient due to lack of competition (X- inefficiency) or… • could be higher due to availability of high profits Copyright 2006 – Biz/ed
  • 31. http://www.bized.co.uk Monopoly• Innovation - could be high because of the promise of high profits, Possibly encourages high investment in research and development (R&D)• Collusion – possible to maintain monopoly power of key firms in industry• High levels of branding, advertising and non-price competition Copyright 2006 – Biz/ed
  • 32. http://www.bized.co.uk Monopoly• Problems with models – a reminder: – Often difficult to distinguish between a monopoly and an oligopoly – both may exhibit behaviour that reflects monopoly power – Monopolies and oligopolies do not necessarily aim for traditional assumption of profit maximisation – Degree of contestability of the market may influence behaviour – Monopolies not always ‘bad’ – may be desirable in some cases but may need strong regulation – Monopolies do not have to be big – could exist locally Copyright 2006 – Biz/ed
  • 33. http://www.bized.co.uk MonopolyCosts / Revenue This is curve for a monopolist Given both the short run and AR (D)the barriers to entry, MC long to equilibrium price the monopolist will be able to likelyrunbe relatively position for a monopoly exploit abnormal profits in to inelastic. Output assumed the£7.00 long profit entry to the be atrun as maximising output market is restricted. (note caution here – not all AC monopolists may aim Monopoly for profit maximisation!) Profit£3.00 MR AR Output / Sales Q1 Copyright 2006 – Biz/ed
  • 34. http://www.bized.co.uk Monopoly WelfareCosts / Revenue implications of monopolies MC The higher in at competitive be A look back a the diagram for The monopoly price lower price price and would £7 output means that £3will reveal perfect unit with output levels £7 per competition with market would be consumer AC that in is reduced, indicated by output equilibrium, price will be surplusat Q2. at Q1. lower levels Loss of consumer equal to the MC of production. the grey shaded area. On the face of it, consumers surplus We can look therefore at a face higher prices and less comparison of the differences choice in monopoly conditions between price and competitive £3 compared to more output in a competitive situation environments. compared to a monopoly. AR MR Output / Sales Q2 Q1 Copyright 2006 – Biz/ed
  • 35. http://www.bized.co.uk Monopoly WelfareCosts / Revenue implications of monopolies MC The monopolist will be benefit £7 from additional producer affected by a loss of producer AC surplus shownto the grey equal by the grey shaded rectangle. triangle but…….. Gain in producer surplus £3 AR MR Output / Sales Q2 Q1 Copyright 2006 – Biz/ed
  • 36. http://www.bized.co.uk Monopoly WelfareCosts / Revenue implications of monopolies MC The value of the grey shaded £7 triangle represents the total welfare loss to society – AC sometimes referred to as the ‘deadweight welfare loss’. £3 AR MR Output / Sales Q2 Q1 Copyright 2006 – Biz/ed
  • 37. http://www.bized.co.uk Contestable Markets• Theory developed by William J. Baumol, John Panzar and Robert Willig (1982)• Helped to fill important gaps in market structure theory• Perfectly contestable market – the pure form – not common in reality but a benchmark to explain firms’ behaviours Copyright 2006 – Biz/ed
  • 38. http://www.bized.co.uk Contestable Markets• Key characteristics: – Firms’ behaviour influenced by the threat of new entrants to the industry – No barriers to entry or exit – No sunk costs – Firms may deliberately limit profits made to discourage new entrants – entry limit pricing – Firms may attempt to erect artificial barriers to entry – e.g… Copyright 2006 – Biz/ed
  • 39. http://www.bized.co.uk Contestable Markets• Over capacity – provides the opportunity to flood the market and drive down price in the event of a threat of entry• Aggressive marketing and branding strategies to ‘tighten’ up the market• Potential for predatory or destroyer pricing• Find ways of reducing costs and increasing efficiency to gain competitive advantage Copyright 2006 – Biz/ed
  • 40. http://www.bized.co.uk Contestable Markets• ‘Hit and Run’ tactics – enter the industry, take the profit and get out quickly (possible because of the freedom of entry and exit)• Cream-skimming – identifying parts of the market that are high in value added and exploiting those markets Copyright 2006 – Biz/ed
  • 41. http://www.bized.co.uk Contestable Markets• Examples of markets exhibiting contestability characteristics: – Financial services – Airlines – especially flights on domestic routes – Computer industry – ISPs, software, web development – Energy supplies – The postal service? Copyright 2006 – Biz/ed
  • 42. http://www.bized.co.uk Market Structures• Final reminders:• Models can be used as a comparison – they are not necessarily meant to BE reality!• When looking at real world examples, focus on the behaviour of the firm in relation to what the model predicts would happen – that gives the basis for analysis and evaluation of the real world situation.• Regulation – or the threat of regulation may well affect the way a firm behaves.• Remember that these models are based on certain assumptions – in the real world some of these assumptions may not be valid, this allows us to draw comparisons and contrasts.• The way that governments deal with firms may be based on a general assumption that more competition is better than less! Copyright 2006 – Biz/ed