Explain how economies change and become interdependent through trade and the international division of labour, analyse the consequences for places, and evaluate responses.

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.