Classification of firms

Unlimited liability means the owner of a business is personally responsible for all of its debts (1), so their personal assets — such as their house and savings — can be taken to pay the business's debts if it fails (e.g. a sole trader or ordinary partner) (1).

Limited liability (2 marks) means the owners (shareholders) of a company can lose only the amount they invested — their personal assets are protected if the business fails, so the most they can lose is the value of their shares (e.g. in an Ltd or PLC). Unlimited liability (2 marks) means the owner is personally responsible for all the business's debts, so their personal assets (house, savings) are at risk if it cannot pay (e.g. a sole trader or ordinary partnership). So limited liability protects owners' personal wealth, while unlimited liability exposes it.

Production is divided into three sectors. The primary sector extracts natural resources — farming, fishing, mining and forestry. The secondary sector manufactures — converting raw materials into finished goods in factories. The tertiary sector provides services — banking, retail, healthcare, education and transport. As an economy develops, the relative importance of these sectors shifts (the 'sectoral shift'). A poor/developing economy relies heavily on the primary sector (e.g. subsistence farming). As it industrialises, resources and workers move into the secondary sector, raising output and incomes (as in China's rapid growth). As it becomes a high-income economy, the tertiary sector dominates, because richer consumers demand more services and manufacturing is often automated or moved abroad (as in the UK or USA, where services are the largest sector). This shift reflects rising productivity and incomes. So the three sectors are extraction, manufacturing and services, and development moves an economy's emphasis from primary → secondary → tertiary.

A vertical merger joins firms at different stages of the same supply chain, and a firm might do this for several reasons. Backward vertical integration — merging with a supplier (e.g. a car maker buying a steel or tyre producer) — lets the firm secure its supply of inputs, guard against shortages, and control input costs and quality; it may also cut out the supplier's profit margin. Forward vertical integration — merging with a distributor or retailer (e.g. a manufacturer buying a chain of shops) — gives the firm guaranteed outlets for its products and direct contact with customers, and again captures the retailer's profit margin. In both cases the firm gains greater control over its supply chain, reducing its dependence on other firms and potentially lowering costs. A vertical merger can also create barriers to entry, since rivals may find it harder to obtain inputs or outlets. So firms undertake vertical mergers mainly to secure inputs or outlets and control the supply chain.

A conglomerate merger joins firms in unrelated industries, and whether it benefits the firm is debatable. Arguments that it benefits the firm: the main gain is diversification of risk — by operating in several unrelated markets, the firm is less dependent on one product, so a downturn in one market can be offset by others, making profits more stable; the merger can open up new markets for growth, and the firms may share resources such as finance, management expertise or distribution. Arguments that it may not: managers may lack expertise in the new, unrelated industry, leading to poor decisions; the firm can become too large and difficult to manage (diseconomies of scale, communication problems); there are few synergies (no economies of scale in production, since the goods are unrelated); and resources/attention may be spread too thinly. Judgement: a conglomerate merger benefits a firm mainly through risk diversification and access to new markets, which can be valuable for a firm dependent on a single volatile product. But it is not always beneficial, because managing unrelated businesses is hard and there are few cost synergies. So whether it helps depends on how well the firm can manage the diverse businesses and on how much it values reducing risk. Many conglomerates are later broken up when the expected benefits fail to appear.

Whether healthcare is better provided by the public or private sector is a key question about the role of firms and government. Arguments for public-sector provision: healthcare is a merit good with positive externalities, which the market would under-provide; public provision funded by taxation makes it available to everyone regardless of income, improving equity so the poor are not denied care, and the government's aim is service, not profit. Arguments for private-sector provision: private firms, driven by the profit motive and competition, may be more efficient, offer more choice and shorter waiting times, and have stronger incentives to innovate and control costs; they also reduce the burden on taxpayers. Drawbacks of each: public provision can be inefficient (long waiting lists, weak cost control, large tax cost), while private provision can exclude the poor (who cannot afford it) and may cut corners to raise profit. Judgement: because healthcare is a merit good with strong equity concerns, there is a powerful case for the public sector to ensure it is provided to everyone — leaving it entirely to the private sector would mean the poor going without essential care. However, the private sector can add efficiency, choice and innovation, so a mixed approach — public provision guaranteeing universal access alongside some private provision — is often best. So neither sector is automatically better; the right balance depends on the country's priorities of equity versus efficiency.