Why Firms Grow or Stay Small — Costs & Revenue of a Firm | IGCSE Economics

Exam Frequency Analysis

Past paper frequency (2018 to 2024)

This topic accounts for approximately 10% of your exam marks.

stable

Medium

Stable10%

Fixed vs variable costs, profit calculations, and average cost appear regularly across both Section A and Section B questions.

A 3-mark question on "why some firms remain small" or "why some firms grow" usually rewards three distinct reasons.

Reason	Explanation
Economies of scale	Lower average cost per unit boosts margins and competitiveness.
Greater market power	A bigger market share gives the firm more pricing power and bargaining strength with suppliers and customers.
Higher total profit	Even if profit per unit stays the same, selling more units increases total profit.
Diversification	Operating across multiple products or markets reduces the risk of failure in any one of them.
Brand recognition	Bigger advertising budgets and a wider customer base build a recognised brand.
Survival	A larger firm typically has the financial cushion to weather a downturn.

How firms grow: two routes.

Organic (internal) growth. Investing in new products, opening new branches, expanding into new countries. Slower but lower-risk.
Inorganic (external) growth. Mergers and takeovers. The IGCSE syllabus distinguishes three forms:
- Horizontal integration: combining with another firm in the same industry at the same stage (e.g. one supermarket chain buying another).
- Vertical integration: combining with a firm earlier or later in the supply chain. A car maker buying a steel supplier is backward vertical; a car maker buying a dealership chain is forward vertical.
- Conglomerate integration: combining with a firm in a completely different industry, often to diversify risk.

Many firms remain small by choice or because of market conditions.

Reason	Why it keeps the firm small
Niche market	The whole market is small (handmade jewellery, specialised consulting, local bespoke services); a larger firm has nowhere to grow.
Personal service	Customers value direct contact with the owner (a local barber, a private tutor); growing dilutes the product.
Owner preference	The owner wants a manageable workload, no investors and full control rather than maximum profit.
Limited capital / finance	Small firms find it harder to borrow or attract investors; growth is constrained by money.
Flexibility / responsiveness	Small firms can adjust to changing tastes overnight; growing makes them slower.
Low barriers to entry	Mass markets with many small firms (cafés, plumbers, taxi services) make it easy to enter but hard to dominate.

Even when a firm wants to grow, several things can stop it.

Diseconomies of scale at very large size.
Limited market size: a regional firm cannot grow forever without going international.
Finance constraints: there may not be enough investment funding available.
Regulation: competition authorities can block mergers that would create monopolies.