How are economies changing and becoming more interdependent, and what are the consequences for workers, regions and trade in Australia and globally?
Explain how economies change and become interdependent through trade and the international division of labour, analyse the consequences for places, and evaluate responses.
How economies shift between primary, secondary and tertiary sectors, how trade and the international division of labour create interdependence, the consequences for workers and regions, and the responses, with Australian and global cases.
Reviewed by: AI editorial process; not yet individually human-reviewed
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What this dot point is asking
This dot point sits in Topic 2, Social and Economic Change, alongside globalisation and inequality. The central geographical idea is interdependence: economies are linked through trade, investment and supply chains, so change in one place reshapes others. Strong answers track these links and judge who gains and who loses.
How economies change
Economies typically shift over time across sectors:
- Primary, extracting raw materials such as iron ore, wheat and gas.
- Secondary, processing materials into manufactured goods.
- Tertiary, providing services such as education, finance and tourism, with a growing quaternary knowledge sector.
Developed economies such as Australia have moved heavily toward services, while much manufacturing has shifted to lower-cost economies in Asia. Australia remains unusual in depending strongly on primary exports, especially minerals and energy sold to Asian markets.
Interdependence through trade and the division of labour
The international division of labour means different stages of production happen in different countries to cut costs. A product may be designed in one country, made from parts produced in several others, and assembled in another. This creates tight interdependence: a smartphone or car relies on supply chains spanning the globe.
Trade binds economies together. Australia's prosperity depends on exporting resources and importing manufactured goods, so its economy is sensitive to demand in China and to global commodity prices.
Consequences across places
Economic change brings winners and losers. The end of Australian car manufacturing in 2017 cost thousands of jobs in Adelaide and Melbourne as production moved offshore, requiring workers to retrain and regions to find new industries. Mining booms can enrich some regions while leaving others behind, deepening regional inequality.
Globally, the shift of manufacturing to countries such as China, Vietnam and Bangladesh has lifted millions out of poverty but exposed workers to low wages and poor conditions, as seen in the 2013 Rana Plaza factory collapse in Bangladesh. Service-based growth rewards skilled, educated workers and can widen the gap with those in declining industries.
Evaluating responses
Governments and communities respond to economic change in several ways:
- Industry and innovation policy to attract new sectors, for example supporting renewable energy and defence manufacturing in South Australia after the car industry closed.
- Retraining and education to help displaced workers move into growing sectors.
- Trade agreements to secure export markets and diversify away from dependence on a single partner.
- Regional development programs to spread opportunity beyond major cities.
Evaluation means weighing trade-offs: trade openness grows exports but exposes workers to competition, while protecting industries preserves jobs but can raise costs. The strongest answers judge these responses with evidence rather than treating change as simply good or bad.
Linking it together
A complete response explains the sector shift between primary, secondary and tertiary, shows how trade and the international division of labour create interdependence, analyses consequences for workers and regions using cases such as Australian manufacturing and Asian production, and evaluates policy responses. That structure matches the geographical skills and applications criteria the SACE Board assesses.
Exam-style practice questions
Practice questions written in the style of SACE Board exam questions on this dot point, with worked answer explainers. The year tag is the paper they imitate, not the source.
SACE 20228 marksStudy the supplied source showing the changing share of employment in primary, secondary and tertiary sectors in Australia between 1970 and 2020. Describe the changes shown, then explain how the international division of labour has contributed to them.Show worked answer →
An 8 mark source-and-explain task needs accurate data description first, then causal explanation.
Describe the data. Quote figures from the source: the primary and secondary (manufacturing) shares fell while the tertiary (services) share rose to dominate employment. Name the direction and approximate magnitude from the resource rather than writing generally.
Explain with the concept. Link the fall in manufacturing to the international division of labour: transnational corporations relocated labour-intensive production to lower-wage economies in Asia, organised through global supply chains and enabled by containerisation and trade liberalisation. Australia retained and grew high-value services such as finance, education and health.
Markers reward exact use of the source, the correct concept (international division of labour), and a clear cause-and-effect chain rather than a list of facts.
SACE 202312 marksEvaluate the effectiveness of responses to economic change in a region affected by deindustrialisation. Refer to a specific Australian example.Show worked answer →
A 12 mark evaluation must weigh responses and reach a judgement, not just list them.
Set up the case. Use the closure of Australian car manufacturing in 2017, which cost thousands of jobs in Adelaide and Melbourne as production moved offshore through the international division of labour.
Assess the responses. Industry and innovation policy redirected South Australia toward defence shipbuilding and renewable energy; retraining and education schemes helped displaced workers move into growing sectors; regional development funding aimed to spread opportunity. For each, judge effectiveness with evidence: new industries created some skilled jobs but not always for the displaced workers, and transitions take years.
Judgement. Conclude that responses softened but did not fully offset the shock, and that effectiveness depended on matching new jobs to displaced workers. Markers reward a two-sided weighing, a specific local case, and a defended conclusion.