2.2.1 2.a - Why trading networks have become more complex

Technology and connected supply chains

A global supply chain links the activities needed to design, produce, move and sell a product across national boundaries. Its complexity depends on how stages are divided and coordinated, rather than simply on the distance travelled by a finished good.

Transport improvements reduce some costs of moving components and finished products. Containers can move between ships, rail and road with less repeated handling; air freight can serve products whose value depends on speed. These systems developed before the twenty-first century, but their wider deployment and integration have supported more extensive networks during it. Not every product travels by the fastest method: costs, weight, perishability and reliability influence the choice.

Communications make coordination possible. Firms exchange specifications, orders, shipping data and payment information between locations. Tracking systems can reveal delays, while digital platforms connect smaller suppliers with distant buyers. Production technologies and standardised components can make separate stages easier to locate in different places. A completed product may therefore incorporate several countries' inputs rather than have one simple national origin.

Connectivity has limits. Ports, roads, electricity, customs systems and digital infrastructure must function together. A fast ship does little to help a producer whose goods wait at an unreliable border. A disruption at a highly specialised supplier can affect many downstream firms, while extra inventories or alternative suppliers can trade some efficiency for resilience.

The WTO's March 2026 report on 2025 trade highlights trade in goods connected with artificial-intelligence investment and changes in sourcing. This is a contemporary example of technology changing demand and networks; it should not be read as a guarantee that one sector or every region will continue to grow.

MNCs and the international division of labour

Multinational corporations organise activity in more than one country and can connect production locations with capital, expertise and markets. Their influence extends through both the businesses they own and the suppliers they contract.

Outsourcing means purchasing an activity from another organisation. Offshoring means locating an activity abroad. A firm can do both by using an independent overseas supplier, but they are not identical: outsourcing can occur domestically and overseas production can remain within the same company. This distinction helps explain who controls investment, working conditions and the risks of changing orders.

The new international division of labour involves a more geographically fragmented allocation of tasks, including design, components, assembly, logistics and customer support. Some locations specialise in labour-intensive stages; others in research, finance or branding. This is more complex than a universal core that designs and a uniform periphery that assembles. EDCs can develop advanced capabilities and domestic lead firms, while ACs retain some manufacturing and face internal inequalities.

Inward investment and contracts can bring employment, training and access to buyers in EDCs. Yet firms can also use competing locations to negotiate costs and conditions. Whether local suppliers move into higher-value activities depends on capabilities, finance, institutions and the ability to retain knowledge, not simply on participation.

Labour mobility supports these networks. Engineers and managers can transfer technical and organisational knowledge, while migration supplies workers to production and service centres. Diaspora links can connect businesses with information, trust and buyers abroad. Mobility is selective: qualifications, visas, money, family circumstances and discrimination affect who can move. Flows of labour and production consequently reinforce one another while remaining governed by different rules.

Regional blocs and South-South trade

Trading blocs and expanding connections between developing economies alter which markets are accessible and how firms organise production. Geographic proximity helps some relationships, but rules, infrastructure and productive capacity determine whether potential links are used.