A2 Economics PowerPoint Briefings 2007 Economies of Scale Long Run Production and Costs tutor2u™ In the Long Run • In the long-run • “But this long run is a misleading guide to current affairs. In the long run we are all dead. Economists set themselves too easy, too useless a task if in tempestuous seasons they can only tell us that when the storm is long past the ocean is flat again.” • John Maynard Keynes, 1936 tutor2u™ Long Run Costs • Economies of scale are not relevant in the short run production function • Economies of scale are the cost advantages that a business can exploit by expanding their scale of production in the long run. The effect of economies of scale is to reduce the long run average costs of production over a range of output. tutor2u™ Long Run Returns to Scale tutor2u™ Long Run Output (Units) Total Costs (£s) Long Run Average Cost (£ per unit) 1000 12000 12 2000 20000 10 5000 45000 9 10000 80000 8 20000 144000 7.2 50000 330000 6.6 100000 640000 6.4 500000 3000000 6 Returns to Scale – Work out the total cost for each scale of production Factor Inputs tutor2u™ Production Costs (K) (La) (L) (Q) (TC) (TC/Q) Capital Land Labour Output Total Cost Average Cost Scale A 5 3 4 100 Scale B 10 6 8 300 Scale C 15 9 12 500 Costs: Assume the cost of each unit of capital = £600, Land = £80 and Labour = £200 Now calculate average cost for each scale Factor Inputs tutor2u™ Production Costs (K) (La) (L) (Q) (TC) (TC/Q) Capital Land Labour Output Total Cost Average Cost Scale A 5 3 4 100 3256 Scale B 10 6 8 300 6512 Scale C 15 9 12 500 9768 Costs: Assume the cost of each unit of capital = £600, Land = £80 and Labour = £200 Measuring the Returns to Scale Factor Inputs tutor2u™ Production Costs (K) (La) (L) (Q) (TC) (TC/Q) Capital Land Labour Output Total Cost Average Cost Scale A 5 3 4 100 3256 32.6 Scale B 10 6 8 300 6512 21.7 Scale C 15 9 12 500 9768 19.5 Costs: Assume the cost of each unit of capital = £600, Land = £80 and Labour = £200 The Long Run Average Cost Curve • The LRAC curve or ‘envelope curve’ is drawn on the assumption of their being an infinite number of plant sizes – hence its smooth appearance • If LRAC is falling when output is increasing then the firm is experiencing economies of scale • When LRAC rises, the firm experiences diseconomies of scale • If LRAC is constant, then the firm is experiencing constant returns to scale tutor2u™ Drawing the Long Run Average Cost Curve Cost per unit AC1 AC2 tutor2u™ AC3 Output Drawing the Long Run Average Cost Curve Cost per unit AC1 AC2 AC3 LRAC tutor2u™ Output Drawing the Long Run Average Cost Curve Cost per unit AC1 AC2 AC3 LRAC Q1 tutor2u™ Q2 Q3 Output The LRAC as a cost boundary Cost per unit Attainable costs per unit LRAC tutor2u™ Output Cost advantages of economies of scale AC1 AC2 140 AC3 120 C os ts (£) 100 80 60 40 20 0 0 1 2 3 4 5 O u tp u t tutor2u™ 6 7 8 9 10 Scale economies – higher output MC1 AC1 AC2 140 AC3 120 Costs (£) 100 80 60 40 20 0 0 1 2 3 4 5 Output tutor2u™ 6 7 8 9 10 Scale economies – higher output MC1 AC1 AC2 140 AC3 120 MC3 Costs (£) 100 80 60 40 20 0 0 1 2 3 4 5 Output tutor2u™ 6 7 8 9 10 Scale economies – higher output MC1 AC1 AC2 140 AC3 120 MC3 Costs (£) 100 80 60 40 AR 20 0 0 1 2 3 4 5 Output tutor2u™ 6 7 MR 8 9 10 Scale economies – higher output MC1 AC1 AC2 140 AC3 120 MC3 Costs (£) 100 80 60 40 AR 20 0 0 1 2 3 4 5 Output tutor2u™ 6 7 MR 8 9 10 Scale economies – higher output MC1 AC1 AC2 140 AC3 120 MC3 Costs (£) 100 80 60 40 AR 20 0 0 1 2 3 4 5 Output tutor2u™ 6 7 MR 8 9 10 Scale economies – higher profit MC1 AC1 AC2 140 AC3 120 MC3 Costs (£) 100 80 60 40 AR 20 0 0 1 2 3 4 5 Output tutor2u™ 6 7 MR 8 9 10 Internal Economies of Scale • Internal economies of scale arise from the internal growth of a business as it expands the scale of its operations • External economies of scale result from the expansion of the industry as a whole of which the business is a member tutor2u™ Technical Economies of Scale • Expensive capital inputs: Large-scale businesses can afford to invest in expensive and specialist capital machinery • Specialisation of the workforce: Within larger firms there is the possibility of splitting complex production processes into separate tasks to boost factor productivity • The law of increased dimensions or the “container principle • Learning by doing: The unit (average) costs of production typically decline in real terms as a result of production experience tutor2u™ Exploiting Size and Scale tutor2u™ The container principle tutor2u™ Scale economies in printing • Advances in printing technology and the use of huge printing presses have driven down the costs of publishing • Print on demand increases the elasticity of supply for many publishing businesses tutor2u™ Marketing Economies of Scale • A large firm can spread its advertising and marketing budget over a much larger output • It can purchase its factor inputs in bulk at negotiated discounted prices if it has monopsony (buying) power in the market tutor2u™ Managerial Economies of Scale • This is a form of division of labour • For example, large-scale manufacturers employ specialists to supervise production systems • Increased investment in human resources and the use of specialist equipment, such as networked computers can improve communication tutor2u™ Financial Economies of Scale • Larger firms are usually rated by the financial markets to be more ‘credit worthy’ and have access to credit facilities, with favourable rates of borrowing • Businesses quoted on the stock market can normally raise fresh money (extra financial capital) more cheaply through the sale (issue) of equities to the capital market • Larger companies are also likely to pay a lower rate of interest on new company bonds because of a better credit rating. tutor2u™ Learning economies • Learning reduces unit cost (LRAC) through the benefits of industry experience • Businesses learn through experience the most productive processes – Workers may become more adapt at their job and their speed increases. – Managers learn to schedule the production process more effectively. – Engineers improve design tolerances and learn to develop better and more specialised tools and plant organisation. – Suppliers learn how to process materials required more effectively tutor2u™ Learning Economies Cost (per unit of output) Economies of Scale B LRAC1 Output tutor2u™ Learning Economies Cost (per unit of output) Economies of Scale A B Learning C economies LRAC1 LRAC2 Output tutor2u™ Network Economies of Scale • Some networks and services have huge potential for economies of scale • As they are more widely used (or adopted), they become more valuable to the business that provides them • The classic examples are the expansion of a common language, a common currency, online auctions and air transport networks • The marginal cost of adding one more user to the network is close to zero, but the resulting financial benefits may be huge tutor2u™ Network economies in aviation • Consider a long haul flight from Sydney to London or Amsterdam • Virtually every city in Europe is just a short connecting flight away • Networks allow consumers to move quickly between many different centres of population • Network economies also important for producers – their production and distribution systems need to be in easy reach of both their suppliers and their customers tutor2u™ Single routes 5 Aircraft A B C D E F G H I J 5 Routes tutor2u™ 5 Aircraft – 55 connections 5 Aircraft A B J C I D H E G F tutor2u™ 55 Connections 2 Networks and an Alliance 2 Networks / Alliances A B A B J C I D H E G C I D H E F tutor2u™ J G F = 210 Connections The Minimum Efficient Scale • The minimum efficient scale (MES) is the long run output where a business fully exploits the available internal economies of scale • It corresponds to the minimum point of the long run average total cost curve • This is also the output where a business achieves productive efficiency • The minimum efficient scale will vary from industry to industry tutor2u™ External Economies of Scale • When the long-term expansion of an industry leads to the development of ancillary services which benefit all or the majority of suppliers in the industry – A labour force skilled in the crafts of the industry – Components suppliers re-locate close to production centres – reducing transportation costs – Concentration of the food processing industry around ports – Trade magazines in which all firms can advertise cheaply and disseminate information – Development research capabilities in local universities tutor2u™ • External economies partially explain the tendency for firms to cluster geographically Economies of Scope • Economies of scope occur where it is cheaper to produce a range of products rather than specialize in just a handful of products. • A company’s management structure, administration systems and marketing departments are capable of carrying out these functions for more than one product • Expanding the product range to exploit the value of existing brands is a good way of exploiting economies of scope. tutor2u™ Different shaped LRAC curves AC U-Shaped LAC: average costs decline over low levels of output, but increase at higher levels of output LRAC2 LRAC1 L-Shaped LAC: Average costs declining over all levels of output. tutor2u™ Output Causes of Diseconomies • Control – costs and limitations of monitoring productivity and the quality of output from thousands of employees in big corporations – possible stakeholder conflicts • Co-ordination - difficult to co-ordinate complicated production processes across several plants in different locations and countries • Co-operation - workers in large firms may feel a sense of alienation and subsequent loss of morale. Possible failures of human resource management tutor2u™