External economies arises essentially from__________

Step 1: Analyze the question The question asks about the main source of external economies of scale. The word "external" is the key: these are benefits that come from outside the firm, but within the industry.

Step 2: Explain the concept

• Internal economies of scale are cost savings that come from a firm's own growth and decisions. Examples are bulk buying, specialisation of labour, and use of better machinery.
• External economies of scale are cost savings that all firms in an industry enjoy as the industry itself grows or concentrates in one area. Examples include: • A pool of skilled labour in the area • Supporting and subsidiary industries, such as suppliers and repair services • Better transport, banking and communication facilities • Shared research and information

These benefits usually arise from localisation of industry, where firms in the same industry cluster in one place. Examples in Nigeria are the Aba leather and garment cluster, Nnewi auto parts, and Ikeja industrial estate.

Step 3: Check each option

• A. A firm's individual policies: These produce internal economies, because they come from within the firm. ❌
• B. Localisation of industry: Firms clustering together share infrastructure, labour and suppliers, so costs fall for all of them. This is the classic source of external economies. ✅
• C. Government economic policy: Government can influence costs, for example through subsidies, but this is not the essential source of external economies. ❌
• D. Free transferability of shares: This is a feature of public limited companies and has to do with ownership and raising capital, not external economies. ❌

Step 4: Answer The correct option is B. localisation of industry.

Exam tip: Remember "External = Environment (industry/location); Internal = Individual firm." If an option mentions clustering, concentration or the industry as a whole, it points to external economies.