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Types and Sizes of Businesses — Exam Questions & Model Answers

Section 3.3.1 — worked exam questions with mark schemes, model answers and examiner commentary.

Economics · WEC13 · Unit 3 · 3.3.1

2 written questions · 12 marks

Time estimates come from one constant per paper — Economics Unit 3 is 2 hours · 80 marks — not from a per-question guess.

This page examines 0 of 30 requirements in 3.3.1 Types and Sizes of Businesses0.0%

Counted over the 2 written questions on this page and nothing else — not the whole question bank, and not the revision notes, which are measured separately and are much better covered. 2 of them carry no spec tag yet, so this number is a floor, not an estimate.

30 requirements in 3.3.1 that no question on this page examines
  • ECON-3.3.1-1a-1 private sector organisations
  • ECON-3.3.1-1a-2 state-owned enterprises (public sector)
  • ECON-3.3.1-1a-3 for-profit and not-for-profit organisations
  • ECON-3.3.1-1a-4 co-operatives
  • ECON-3.3.1-1a-5 joint ventures.
  • ECON-3.3.1-2a-1 SMEs (small- and medium-size enterprises)
  • ECON-3.3.1-2a-2 large corporations.
  • ECON-3.3.1-2b-1 organic growth
  • ECON-3.3.1-2b-2 merger/takeover:
  • ECON-3.3.1-2b-3 forward vertical integration
  • ECON-3.3.1-2b-4 backward vertical integration
  • ECON-3.3.1-2b-5 horizontal integration
  • ECON-3.3.1-2b-6 conglomerate integration.
  • ECON-3.3.1-2c Advantages and disadvantages of each type of merger/takeover.
  • ECON-3.3.1-2d-1 size of market
  • ECON-3.3.1-2d-2 access to finance
  • ECON-3.3.1-2d-3 owner objectives
  • ECON-3.3.1-2d-4 government regulation and bureaucracy.
  • ECON-3.3.1-2e Reasons some firms tend to remain small and others grow.
  • ECON-3.3.1-2f Impact of growth of firms on businesses, workers and consumers.
  • ECON-3.3.1-2g-1 reasons for demergers
  • ECON-3.3.1-2g-2 impact of demergers on businesses, workers and consumers.
  • ECON-3.3.1-3a-1 profit maximisation
  • ECON-3.3.1-3a-2 revenue maximisation
  • ECON-3.3.1-3a-3 sales volume maximisation.
  • ECON-3.3.1-3a-4 behavioural theories: satisficing.
  • ECON-3.3.1-3b The significance of the divorce of ownership from control for business objectives: the principal-agent problem.
  • ECON-3.3.1-3c-1 profit maximisation
  • ECON-3.3.1-3c-2 revenue maximisation
  • ECON-3.3.1-3c-3 sales volume maximisation.

Exam questions

Every question here carries a tariff that exists in IAL Economics. Open the mark scheme before the model answer and you will see what the examiner is paid to look for.

  1. Explain4 marksAO1 · AO26 min

    Explain what is meant by economies of scale and give an example.

    Mark scheme
    1–2 marks
    Definition: average costs fall as output increases
    3–4 marks
    Application: named type of economy of scale with example
    Model answer — 4 / 4
    What the marks in the margin meanKKnowledge/DefinitionAApplication
    Economies of scale are the cost advantages that firms gain as output increases — average (unit) costs fall as the scale of production rises. K They arise because fixed costs are spread over a larger output and firms can exploit efficiencies unavailable to smaller producers. K

    For example, purchasing economies allow large firms like Tesco to negotiate bulk discounts from suppliers — buying 10 million units at a lower price per unit than a small corner shop. A Technical economies enable large car manufacturers like Toyota to invest in robotic assembly lines that reduce labour costs per vehicle — an investment that would be uneconomical for a small producer. A
    Examiner commentary
    Clear definition that correctly identifies falling average costs (not just falling costs). Two named types with real-world firm examples. Avoid saying "the firm saves money" — instead say "average costs fall" or "unit costs decrease."

  2. Examine8 marksAO1 · AO2 · AO3 · AO412 min

    Examine the reasons why a firm might experience diseconomies of scale.

    Mark scheme
    Examine (8)
    Appendix 6: Requires knowledge, understanding, application, analysis and evaluation. Requires an explanation which includes a chain of reasoning, and diagrams where appropriate. Focuses on depth rather than breadth. Any relevant data provided needs to be interpreted. There should be a brief assessment of the arguments/factors/evidence.
    Level 1 — 1–2 marks
    Isolated knowledge and understanding. No application to the context and no chain of reasoning.
    Level 2 — 3–4 marks
    Knowledge applied to the context. A chain of reasoning is begun but not carried through; any data given is described rather than interpreted.
    Level 3 — 5–6 marks
    A developed chain of reasoning in context, with a diagram where one is appropriate. Depth rather than breadth; data interpreted. Assessment is implied rather than made.
    Level 4 — 7–8 marks
    A developed chain of reasoning in context AND a brief assessment of the arguments, factors or evidence — the clause that separates Examine from Analyse.
    Indicative content
    Knowledge: definition of diseconomies of scale (rising LRAC beyond optimal output). Application: named firm or industry example. Analysis: communication breakdown, coordination problems, worker alienation, management layers.
    Model answer — 5–6 / 8
    What the marks in the margin meanKKnowledgeAApplicationAnAnalysis chain

    Para 1

    Diseconomies of scale occur when a firm grows so large that its long-run average costs begin to rise as output increases. K This means the firm has expanded beyond its minimum efficient scale (MES) — the output level where LRAC is at its lowest. K

    Para 2

    First, communication problems arise as messages must pass through multiple management layers. Instructions become distorted, decisions are delayed, and departments may work at cross-purposes. An HSBC, operating across 60+ countries with over 200,000 employees, has repeatedly restructured to address sluggish internal communication that delayed responses to market changes. A

    Para 3

    Second, coordination difficulties increase — ensuring thousands of employees, multiple departments, and global supply chains all work in harmony becomes exponentially harder. An Third, worker alienation may set in — in very large firms, individual workers feel like a small cog in a machine, reducing motivation and productivity. An Without the personal connection to the firm's mission found in smaller businesses, absenteeism rises and effort falls, increasing costs per unit. An
    Examiner commentary
    Three causes — communication, coordination and worker alienation — each developed to the rising average cost it produces, with HSBC's repeated restructuring as application. It is Level 3 because the causes are explained and not assessed. A Level 4 needs a brief assessment: diseconomies are not inevitable at scale, since better information systems and decentralised divisions can postpone them, so how a firm is organised matters as much as how large it is.
    Why this loses marks — a mid-band attempt at the same question

    Not a real script, and not written for this panel. It is 2 of 3 paragraphs of the model answer above, with “Para 3” removed. Nothing is rewritten. Open the model answer above and the difference is exactly the paragraphs named here.

    What the marks in the margin meanKKnowledgeAApplicationAnAnalysis chain

    Para 1

    Diseconomies of scale occur when a firm grows so large that its long-run average costs begin to rise as output increases. K This means the firm has expanded beyond its minimum efficient scale (MES) — the output level where LRAC is at its lowest. K

    Para 2

    First, communication problems arise as messages must pass through multiple management layers. Instructions become distorted, decisions are delayed, and departments may work at cross-purposes. An HSBC, operating across 60+ countries with over 200,000 employees, has repeatedly restructured to address sluggish internal communication that delayed responses to market changes. A

    The band this attempt cannot reach

    Level 4 — 7–8 marks
    A developed chain of reasoning in context AND a brief assessment of the arguments, factors or evidence — the clause that separates Examine from Analyse.

    Where it tops out instead

    Level 3 — 5–6 marks
    A developed chain of reasoning in context, with a diagram where one is appropriate. Depth rather than breadth; data interpreted. Assessment is implied rather than made.

    No mark is put on this attempt. The full answer above is marked 5–6 / 8 by its own commentary; what a truncated version scores depends on the script, and inventing a number for it would be the kind of false precision this page exists to avoid.

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