CAIE IGCSE Economics 3.4.3 Economies & diseconomies of scale
Practise explaining how changes in scale affect average cost, using ATC diagrams, firm examples and internal or external economies.
- Syllabus
- 2027–2029
- Course
- Economics 0455
Practise explaining how changes in scale affect average cost, using ATC diagrams, firm examples and internal or external economies.
Read the source material carefully before answering Question 1.

Source material: Gabon's industries and labour force
Gabon is a small West African country. Its rainforests reduce air pollution, provide wood for timber production, protect against floods and reduce soil erosion. The Gabonese Government wants to conserve the country's rainforests. It has created some national parks which has increased tourism, affecting the current account of the balance of payments.
The Gabonese Government wants to reduce the country's reliance on timber production, oil production and agriculture. The country is Africa's fifth-largest oil producer but its resources of oil are running out. The oil industry causes water pollution. The country has other natural resources, including gold. In 2022, new deposits of gold were found in Gabon.
Gabon's agricultural industry employs a high proportion of the country's labour force. Fig. 1.1 shows the literacy rate and the percentage of the labour force employed in agriculture in six selected countries in 2022.

Fig.1.1 The literacy rate and the percentage of the labour force employed in agriculture in selected countries in 2022
In recent years, Gabon has experienced a high rate of unemployment among 15-24 year olds. High rates of youth unemployment can result in young people not gaining the skills and experience needed to achieve high productivity. It can also have a harmful effect on their confidence. Some governments pay private sector firms to give work experience to unemployed young people. The quality of this experience can vary.
The Gabonese Government wants to develop its textile industry, encouraging firms to grow in size. The output of the industry will be affected not only by possible government support but also by its use of technology and specialisation of workers.
Discuss whether or not a growth in the size of firms in Gabon's textile industry will reduce their average cost of production.
ward up to 4 marks for logical reasons why it might, which may include:
- labour economies ( 1 ) workers can specialise / increase labour productivity (1)
- managerial economies (1) employ specialists (1)
- technical economies (1) using advanced capital equipment (1)
- buying / purchasing economies ( 1 ) receiving a discount as buying in bulk (1)
- selling economies ( 1 ) reducing transport costs ( 1 )
- marketing economies (1) spreads fixed costs over more output (1)
- financial economies ( 1 ) easier / cheaper to borrow ( 1 )
- research and development economies (1) introduce new products / new production methods (1)
- risk bearing economies (1) able to suffer fall in demand for one product or supply problems connected to one product (1)
- may experience external economies of scale (1) example (1).
Award up to 4 marks for logical reasons why it might not, which may include:
- difficulty of controlling a large firm (1) may be slower to make decisions (1)
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Maximum of 2 marks for just listing different types of economies and diseconomies of scale or just stating economies of scale and diseconomies of scale may be experienced without references to examples.
Essentially full marks can be gained for identification and explanation of two economies of scale and one diseconomy of scale OR one economy of scale and two diseconomies of scale.
Note there is no marks awarded for simply stating that average costs may or rise or for drawing a diagram showing average costs changing as a firm grows in size.
1(h)
- communication problems ( 1 ) may be more difficult to keep everyone informed (1)
- poor industrial relations (1) may be less contact between managers and workers / decreasing productivity (1).
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