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Cambridge IGCSE Economics revision notes

Firms Revision Notes

Cambridge IGCSE revision notes for Firms.

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Firms

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Complete revision guide 1 of 5

Categorising Firms by Sector, Ownership, and Size

This note explains how firms are classified into primary, secondary, and tertiary sectors based on their economic activities, distinguishes between private and public sector ownership, and outlines the relative sizes of firms. Understanding these categories helps clarify the role firms play in the economy without requiring detailed knowledge of firm structures.

Syllabus source

Section 3, Topic 3.5, page 18, objective 3.5.1

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What you should be able to do

  • ✓Identify the three main economic sectors and the types of activities they include.
  • ✓Distinguish between private sector and public sector firms based on ownership and control.
  • ✓Recognise the range of firm sizes from small local businesses to large multinational corporations.
  • ✓Understand how sector classification and ownership influence a firm's role in the economy.
1

Economic Sectors: Primary, Secondary, and Tertiary

Firms are first categorised by the sector of the economy in which they operate. The primary sector involves activities that extract natural resources directly from the earth or environment. Examples include farming, fishing, mining, and forestry. These firms supply raw materials to other sectors.

The secondary sector includes firms engaged in manufacturing and construction. These firms transform raw materials from the primary sector into finished goods or infrastructure. For instance, a factory producing cars or a company building houses operates in the secondary sector.

The tertiary sector consists of firms providing services rather than goods. This includes retail shops, banks, schools, hospitals, and entertainment providers. These firms support the economy by offering services that meet consumer and business needs.

  • Primary sector: extraction of raw materials (e.g., coal mining, fishing)
  • Secondary sector: manufacturing and construction (e.g., car factories, building firms)
  • Tertiary sector: services (e.g., banks, restaurants, education)
2

Ownership: Private Sector vs Public Sector Firms

Firms can also be classified by ownership and control. Private sector firms are owned by individuals, groups of private investors, or shareholders. Their main goal is usually to make a profit. Examples include family-owned shops, multinational corporations like Apple, or small local businesses.

Public sector firms are owned and operated by the government. They often provide essential services that may not be profitable but are important for society, such as public hospitals, police services, or national railways. Public ownership means the government controls decisions and funding.

The distinction affects how firms operate, their objectives, and how they are funded. Private firms rely on private capital and market sales, while public firms may receive government funding and have social objectives.

  • Private sector: owned by individuals or companies aiming for profit
  • Public sector: owned and run by government, often providing public services
3

Firm Size: From Small Businesses to Multinationals

Firms vary greatly in size, which influences their market power, resources, and economic impact. Small firms often serve local markets and have fewer employees and lower turnover. For example, a local bakery or a family-run taxi service.

Medium-sized firms may operate regionally or nationally, employing hundreds of workers and producing larger volumes. Large firms include multinational corporations that operate in many countries, such as Coca-Cola or Toyota, with extensive resources and influence.

Size affects a firm's ability to invest, compete, and grow. Larger firms can benefit from economies of scale, while smaller firms may be more flexible and responsive to local needs.

  • Small firms: local, few employees, limited market reach
  • Medium firms: regional or national presence, more employees
  • Large firms: multinational corporations with global operations
4

Interrelation of Sector, Ownership, and Size

A firm’s sector, ownership, and size often interact. For example, many primary sector firms are small and privately owned, such as family farms. However, large public sector firms can exist in the tertiary sector, like national health services.

Secondary sector firms can be private or public and vary in size from small workshops to large factories. Tertiary sector firms include a wide range of sizes and ownership types, from small private shops to large public transport companies.

Understanding these categories helps explain the diversity of firms in an economy and their different roles.

  • Primary sector firms often small and private (e.g., family farms)
  • Public sector firms common in tertiary sector (e.g., public hospitals)
  • Firm size varies across all sectors and ownership types

At-a-glance summary

Comparison table

CategoryDefinitionExampleExam Use
Primary SectorFirms extracting natural resourcesFishing companyIdentify sector by activity type
Secondary SectorFirms manufacturing goods or constructionCar factoryClassify firms by production role
Tertiary SectorFirms providing servicesBankRecognise service-based firms
Private SectorOwned by individuals or companiesLocal restaurantDistinguish ownership types
Public SectorOwned and run by governmentPublic hospitalExplain ownership impact
Small FirmFew employees, local marketFamily bakeryUnderstand size implications
Large FirmMany employees, multinationalGlobal car manufacturerRelate size to market influence

Active recall

Quick check

1. Which sector does a coal mining company belong to?

Primary sector, because it extracts raw materials from the earth.

2. Is a government-owned hospital a private or public sector firm?

Public sector, as it is owned and operated by the government.

3. Give an example of a tertiary sector firm.

A bank, a restaurant, or a school, since they provide services rather than goods.

4. What type of firm is a small family-run bakery?

A small private sector firm, likely operating in the tertiary sector if it provides services or secondary if it produces goods.

Complete revision guide 2 of 5

Small Firms: Advantages, Challenges, and Market Role

This note explores the reasons small firms exist in the market, their advantages and disadvantages, and the difficulties they face. It explains how small firms contribute to economic diversity and innovation by serving niche markets and providing personalised services, while also highlighting their resource constraints and competitive challenges.

Syllabus source

Section 3, Topic 3.5, page 18, objective 3.5.2

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What you should be able to do

  • ✓Understand why small firms exist in the market.
  • ✓Identify the advantages small firms have over larger firms.
  • ✓Recognise the disadvantages and difficulties small firms encounter.
  • ✓Analyse the role of small firms in economic development and market diversity.
1

Reasons for the Existence of Small Firms

Small firms exist because they can serve specific needs that larger firms may overlook. They often target niche markets where specialised products or personalised services are valued. For example, a local bakery focusing on gluten-free products caters to a specific customer group that large supermarkets might not prioritise.

Additionally, small firms can be easier to set up due to lower capital requirements and simpler organisational structures. This accessibility encourages entrepreneurship and innovation, allowing new ideas to enter the market.

Small firms also contribute to local economies by creating jobs and supporting community development, which sustains their presence despite competition from larger firms.

  • Serve niche markets with specialised products or services.
  • Lower start-up costs encourage entrepreneurship.
  • Support local economies and employment.
2

Advantages of Small Firms

Small firms have several advantages that help them compete in the market. Their size allows for greater flexibility and quicker decision-making, enabling them to adapt rapidly to changing customer preferences or market conditions.

They often provide personalised customer service, building strong relationships and customer loyalty. For instance, a small clothing boutique can tailor recommendations and offer customised fittings, which large chain stores may not provide.

Small firms can also foster innovation by experimenting with new ideas without the bureaucratic constraints found in larger organisations. This can lead to unique products or services that differentiate them from competitors.

  • Flexibility and quick decision-making.
  • Personalised customer service enhances loyalty.
  • Innovation through experimentation and less bureaucracy.
3

Disadvantages and Difficulties Faced by Small Firms

Despite their advantages, small firms face significant challenges. Limited access to finance restricts their ability to invest in technology, marketing, or expansion. For example, a small café may struggle to secure loans to renovate or open new branches.

They often lack economies of scale, resulting in higher average costs compared to larger firms. This can make their prices less competitive, especially in markets dominated by big companies.

Small firms may also find it difficult to attract skilled labour or manage regulatory compliance due to limited resources. Additionally, they are more vulnerable to market fluctuations and economic downturns, which can threaten their survival.

  • Restricted access to finance limits growth.
  • Higher average costs due to lack of economies of scale.
  • Challenges in attracting skilled labour and meeting regulations.
  • Greater vulnerability to economic changes.
4

Role of Small Firms in the Economy

Small firms contribute significantly to economic diversity by increasing the variety of goods and services available. Their presence encourages competition, which can lead to better quality and lower prices for consumers.

They are important sources of employment, especially in local communities, reducing unemployment and supporting livelihoods.

By fostering innovation, small firms can stimulate economic growth and help develop new industries. Their ability to adapt quickly to market needs also supports economic resilience during changing conditions.

  • Enhance market diversity and competition.
  • Provide local employment opportunities.
  • Drive innovation and economic growth.
  • Support economic resilience through adaptability.

At-a-glance summary

Comparison table

AspectSmall FirmsLarge FirmsExample
Decision-makingFast and flexibleSlower, more bureaucraticSmall café vs. supermarket chain
Customer ServicePersonalised and directStandardised and impersonalLocal tailor vs. clothing retailer
Access to FinanceLimited and challengingEasier with more optionsStartup bakery vs. multinational food company
Cost StructureHigher average costsLower average costs due to economies of scaleIndependent shop vs. large factory

Active recall

Quick check

1. Why do small firms often serve niche markets?

Because they can specialise in specific products or services that larger firms may overlook, meeting unique customer needs.

2. What is one advantage small firms have over large firms in customer relations?

They can offer personalised and direct customer service, building strong loyalty.

3. Name a major difficulty small firms face when trying to expand.

Limited access to finance restricts their ability to invest and grow.

4. How do small firms contribute to economic growth?

By fostering innovation and increasing market diversity, they stimulate new ideas and competition.

Complete revision guide 3 of 5

Firm Growth: Reasons and Types

This note explains why firms grow and the main types of growth: internal growth through expanding market share and external growth via mergers. It covers the motivations behind growth, methods firms use, and the implications for competitiveness and market structure.

Syllabus source

Section 3, Topic 3.5, page 18, objective 3.5.3

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What you should be able to do

  • ✓Understand the reasons why firms seek to grow.
  • ✓Distinguish between internal and external growth of firms.
  • ✓Explain how firms increase market share through internal growth.
  • ✓Describe different forms of mergers as examples of external growth.
  • ✓Analyse the benefits and challenges associated with each growth type.
1

Why Do Firms Aim to Grow?

Firms pursue growth primarily to increase profits and market power. Larger firms can benefit from economies of scale, reducing average costs and improving competitiveness. Growth can also help firms spread fixed costs over more units, invest in research and development, and improve bargaining power with suppliers and customers. Additionally, growth may reduce the risk of being overtaken by competitors and increase brand recognition. For example, a local bakery expanding to multiple outlets can increase its customer base and reduce per-unit costs.

  • Increase profits through higher sales and lower costs.
  • Gain economies of scale to reduce average costs.
  • Enhance market power and competitive position.
  • Spread fixed costs over larger output.
  • Increase brand recognition and customer loyalty.
2

Internal Growth: Expanding Market Share

Internal growth, also called organic growth, occurs when a firm expands its own operations without merging or acquiring other firms. This can be achieved by increasing production capacity, improving product quality, launching new products, or enhancing marketing efforts to attract more customers. For instance, a smartphone manufacturer might invest in new factories and advertise aggressively to increase its share of the mobile phone market. Internal growth is usually gradual and funded by retained profits or borrowing.

  • Increase production capacity to meet higher demand.
  • Improve product quality or diversify product range.
  • Use marketing and sales strategies to attract customers.
  • Fund growth through retained earnings or loans.
  • Example: A café opening new branches in the same city.
3

External Growth: Mergers and Acquisitions

External growth happens when a firm expands by merging with or acquiring another firm. This can rapidly increase market share, combine resources, and reduce competition. There are different types of mergers: horizontal (between competitors), vertical (between firms at different production stages), and conglomerate (between unrelated businesses). For example, two car manufacturers merging is a horizontal merger, while a car manufacturer acquiring a tyre company is vertical. External growth can provide quick access to new markets and technologies but may face regulatory scrutiny.

  • Mergers combine two firms into one entity.
  • Acquisitions involve one firm buying another.
  • Horizontal mergers: between competitors in the same industry.
  • Vertical mergers: between firms at different production stages.
  • Conglomerate mergers: between unrelated businesses.
  • Example: A supermarket buying a logistics company (vertical).
4

Comparing Internal and External Growth

Internal and external growth differ in speed, cost, and complexity. Internal growth is slower and less risky but may limit how fast a firm can expand. External growth can be faster and create larger firms quickly but involves integration challenges and possible cultural clashes. Both types aim to improve competitiveness and profitability but suit different strategic goals and market conditions.

  • Internal growth is gradual and controlled by the firm.
  • External growth is faster but more complex.
  • Internal growth relies on existing resources and capabilities.
  • External growth requires negotiation and regulatory approval.
  • Both increase market share and competitive advantage.
5

Implications of Firm Growth

Growth affects market structure and competition. Large firms from mergers may dominate markets, potentially reducing competition and leading to higher prices. However, bigger firms can innovate more and offer better products. Growth also impacts employees and consumers differently depending on the method and scale. Understanding growth types helps explain industry dynamics and firm strategies.

  • Large firms may gain monopoly power.
  • Growth can lead to economies of scale and innovation.
  • Potential risks include reduced competition.
  • Growth strategies influence market dynamics.
  • Example: A telecom merger creating a dominant provider.

At-a-glance summary

Comparison table

Growth TypeMethodSpeed of GrowthExample
Internal GrowthExpanding production, marketing, product developmentGradualA bakery opening new branches
External GrowthMergers and acquisitionsRapidTwo car manufacturers merging
Horizontal MergerBetween competitors in the same industryFastTwo smartphone makers merging
Vertical MergerBetween firms at different production stagesFastA car maker acquiring a tyre supplier

Active recall

Quick check

1. What is internal growth in a firm?

Internal growth is when a firm expands by increasing its own production, improving products, or marketing to gain more market share without merging or acquiring other firms.

2. Give an example of a vertical merger.

A vertical merger occurs when a firm merges with another at a different stage of production, such as a car manufacturer acquiring a tyre company.

3. Why might a firm prefer external growth?

A firm might prefer external growth because it allows rapid expansion, access to new markets or technologies, and reduces competition quickly.

4. Name one advantage of internal growth.

Internal growth is less risky and allows the firm to expand gradually using its own resources.

Complete revision guide 4 of 5

Types of Mergers: Horizontal, Vertical, and Conglomerate

Mergers combine companies to form a single entity, influencing market structure and firm performance. Understanding horizontal, vertical, and conglomerate mergers helps explain their strategic purposes, benefits, and drawbacks.

Syllabus source

Section 3, Topic 3.5, page 18, objective 3.5.4

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What you should be able to do

  • ✓Identify and distinguish between horizontal, vertical, and conglomerate mergers.
  • ✓Explain the strategic reasons firms pursue each type of merger.
  • ✓Evaluate the benefits and drawbacks associated with each merger type.
  • ✓Apply knowledge of mergers to real-world examples and market outcomes.
1

Introduction to Mergers

A merger occurs when two or more companies combine to form a single business entity. This process can reshape industries by altering competition, market share, and operational efficiency. Firms merge for various strategic reasons, including growth, diversification, and cost reduction. Understanding the types of mergers is essential to analyse their impact on markets and firms' performance.

  • Mergers reduce the number of firms in a market, potentially affecting competition.
  • They can lead to economies of scale and increased market power.
  • Different types of mergers reflect different strategic goals.
2

Horizontal Mergers

Horizontal mergers happen between companies operating in the same industry and at the same stage of production. For example, two car manufacturers merging to increase their combined market share. The main goal is often to reduce competition, increase market power, and achieve economies of scale by spreading fixed costs over a larger output.

Such mergers can lead to higher prices for consumers if competition is significantly reduced, which may attract regulatory scrutiny. However, they can also improve efficiency by eliminating duplicate functions and increasing bargaining power with suppliers.

  • Example: Two smartphone producers merging to dominate the market.
  • Benefit: Increased market share and reduced competition.
  • Drawback: Risk of monopoly power and regulatory challenges.
3

Vertical Mergers

Vertical mergers involve companies at different stages of the production process within the same industry. For instance, a car manufacturer merging with a tyre supplier. This integration can improve supply chain coordination, reduce transaction costs, and secure supply of key inputs.

By controlling more stages of production, firms can reduce delays and costs, improving overall efficiency. However, vertical mergers may raise barriers to entry for other firms and could lead to anti-competitive practices if the merged firm restricts access to essential inputs.

  • Example: A clothing retailer merging with a textile manufacturer.
  • Benefit: Improved supply chain efficiency and cost savings.
  • Drawback: Potential to limit competitors’ access to inputs.
4

Conglomerate Mergers

Conglomerate mergers occur between firms in unrelated industries. For example, a food company merging with a technology firm. The primary motivation is diversification, which spreads business risk across different markets and reduces dependence on a single industry.

While diversification can stabilise profits, conglomerate mergers often face challenges in managing very different businesses and may not achieve significant economies of scale. Investors sometimes view conglomerates less favourably due to complexity and lack of focus.

  • Example: A beverage company merging with a media company.
  • Benefit: Risk reduction through diversification.
  • Drawback: Difficulties in managing unrelated businesses effectively.
5

Comparing Benefits and Drawbacks

Each merger type offers distinct advantages and disadvantages. Horizontal mergers focus on market power and efficiency but risk reducing competition. Vertical mergers improve coordination and reduce costs but may create barriers for rivals. Conglomerate mergers diversify risk but can suffer from management complexity.

Understanding these trade-offs helps explain why firms choose particular merger strategies and how regulators assess their impact on markets.

  • Horizontal: Market share growth vs. competition concerns.
  • Vertical: Supply chain control vs. potential anti-competitive effects.
  • Conglomerate: Diversification vs. management challenges.

At-a-glance summary

Comparison table

AspectHorizontal MergerVertical MergerConglomerate Merger
DefinitionBetween firms in the same industry and production stageBetween firms at different production stages in the same industryBetween firms in unrelated industries
ExampleTwo smartphone manufacturers mergingA car maker merging with a tyre supplierA food company merging with a media firm
Main BenefitIncreased market share and economies of scaleImproved supply chain efficiency and cost reductionDiversification and risk spreading
Main DrawbackReduced competition and regulatory riskPotential barriers to entry and anti-competitive practicesManagement complexity and lack of synergy
Impact on CompetitionMay reduce competition significantlyMay limit competitors’ access to inputsUsually no direct effect on competition

Active recall

Quick check

1. What is a horizontal merger?

A merger between companies in the same industry and at the same production stage, aiming to increase market share and reduce competition.

2. Give an example of a vertical merger.

A car manufacturer merging with a tyre supplier, combining different stages of production within the same industry.

3. Why do firms pursue conglomerate mergers?

To diversify their business activities and reduce risk by operating in unrelated industries.

4. Name one drawback of horizontal mergers.

They can reduce competition, potentially leading to higher prices and regulatory challenges.

Complete revision guide 5 of 5

Impact of Internal and External Economies and Diseconomies of Scale on Firms and Industries

This note explains how changes in production levels affect firms and industries through internal and external economies and diseconomies of scale, influencing average costs and operational efficiency.

Syllabus source

Section 3, Topic 3.5, page 18, objective 3.5.5

Open source document ↗

What you should be able to do

  • ✓Define economies and diseconomies of scale and distinguish between internal and external types.
  • ✓Explain how internal economies of scale reduce average costs as a firm expands production.
  • ✓Describe external economies of scale and how they benefit an entire industry.
  • ✓Analyse how internal diseconomies of scale increase average costs when a firm becomes too large.
  • ✓Discuss external diseconomies of scale and their impact on industries as they grow.
1

Understanding Economies and Diseconomies of Scale

Economies of scale occur when a firm's average costs decrease as it increases production. This means producing each unit becomes cheaper due to efficiencies gained. Conversely, diseconomies of scale happen when average costs rise as production expands beyond an optimal size, often due to inefficiencies.

Economies and diseconomies of scale can be internal, arising within a firm, or external, affecting all firms in an industry. Recognising these distinctions helps explain cost behaviour and competitive dynamics as firms and industries grow.

  • Economies of scale lower average costs with increased output.
  • Diseconomies of scale raise average costs when output grows too large.
  • Internal effects relate to individual firms; external effects relate to the whole industry.
2

Internal Economies of Scale: Cost Advantages Within a Firm

Internal economies of scale are cost savings that a single firm experiences as it expands production. These arise from factors under the firm's control, such as improved technology, bulk buying, and labour specialisation.

For example, a car manufacturer buying steel in large quantities may negotiate discounts, reducing material costs per vehicle. Similarly, employing specialised workers on assembly lines can speed production and reduce labour costs per unit.

These economies reduce the firm's average cost curve, enabling it to compete more effectively by offering lower prices or increasing profit margins.

  • Bulk purchasing reduces input costs.
  • Specialisation increases labour productivity.
  • Technological improvements enhance efficiency.
3

External Economies of Scale: Industry-Wide Benefits

External economies of scale occur when the growth of an entire industry leads to cost reductions for all firms within it, regardless of their individual size.

For instance, if a region develops a skilled workforce specialised in electronics manufacturing, all electronics firms benefit from easier recruitment and training. Infrastructure improvements like better transport links or supplier networks also lower costs for all firms.

These external factors shift the average cost curves of all firms downward, encouraging industry expansion and attracting new entrants.

  • Skilled labour pools reduce training costs.
  • Improved infrastructure lowers transport and logistics costs.
  • Supplier specialisation benefits all firms in the industry.
4

Internal Diseconomies of Scale: Rising Costs Within Large Firms

When a firm grows beyond an efficient size, internal diseconomies of scale can occur, causing average costs to rise.

Large firms may face management challenges, such as communication breakdowns and slower decision-making. Coordination becomes complex, and motivation among workers may decline due to impersonality.

For example, a multinational company with thousands of employees might struggle to maintain effective oversight, leading to inefficiencies and higher per-unit costs.

  • Management inefficiencies increase overhead costs.
  • Communication problems slow operations.
  • Worker motivation and supervision become difficult.
5

External Diseconomies of Scale: Industry-Level Cost Increases

External diseconomies of scale happen when the expansion of an industry causes average costs to rise for all firms within it.

Examples include congestion in transport networks, increased competition for scarce resources, or environmental regulations tightening due to pollution from many firms.

For example, if many factories cluster in one area, traffic congestion may delay deliveries, raising costs for all firms. Similarly, rising wages due to labour shortages can increase costs industry-wide.

  • Infrastructure congestion raises transport costs.
  • Resource shortages increase input prices.
  • Environmental controls add compliance costs.

At-a-glance summary

Comparison table

AspectInternal Economies of ScaleExternal Economies of ScaleInternal Diseconomies of Scale  | External Diseconomies of Scale
DefinitionCost savings within a firm as it growsCost savings for all firms as the industry growsCost increases within a firm when it becomes too large | Cost increases for all firms due to industry growth
CauseFirm-specific factors like bulk buying, specialisationIndustry-wide factors like skilled labour pools, infrastructureFirm-specific inefficiencies like poor management | Industry-wide issues like congestion, resource scarcity
ExampleA bakery buying flour in bulk at discountA tech hub with many skilled programmersA large factory with slow communication | Traffic jams delaying deliveries for all firms
Effect on Average CostAverage cost per unit decreasesAverage cost per unit decreasesAverage cost per unit increases | Average cost per unit increases
Exam TipExplain how firm actions reduce costsDiscuss benefits from industry growthAnalyse management or coordination problems | Discuss external pressures raising costs

Active recall

Quick check

1. What is an internal economy of scale?

It is a cost saving that occurs within a firm as it increases production, such as bulk purchasing or labour specialisation.

2. Give an example of an external economy of scale.

An example is when an industry grows in a region, creating a skilled workforce that all firms can employ, reducing training costs.

3. Why might a firm experience diseconomies of scale?

Because as it grows too large, management becomes inefficient, communication slows, and coordination problems increase costs.

4. How can external diseconomies of scale affect an industry?

Industry growth can cause congestion or resource shortages, raising costs for all firms in that industry.

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