• A mixed economy blends the free market and government planning — both public and private sectors own resources and produce goods.
• Every economic system must answer three questions: what to produce, how to produce it, and who to produce it for.
• Public sector = government-owned, aims to provide a service. Private sector = privately owned, usually aims to maximise profit.
• Free markets sometimes fail to allocate resources efficiently — this is called market failure, and it's the government's main excuse to step in.
• Six causes of market failure: demerit goods, merit goods, public goods, monopoly power, factor immobility, externalities.
• Public goods (non-excludable + non-rival) create the free rider problem, so the free market won't provide them at all.
• Countries vary hugely in public sector size — Nordic countries go big on public provision; the US and Japan lean towards free markets.
• Privatisation moves assets from state → private hands; nationalisation moves them the opposite way — each has winners and losers.

Think of every economy as sitting somewhere on a spectrum. On one end is a pure free market (no government involvement at all — prices and private firms decide everything). On the other end is a pure planned/command economy (the state owns everything and decides everything). Almost no real country sits at either extreme — instead, they sit somewhere in the middle, which is why we call it a mixed economy: individuals, firms, and the government all own factors of production and help decide what gets produced.

Countries like the UK, Germany, Ireland and Japan are all mixed economies — but they're not mixed in the same proportion. Some lean much more heavily on government intervention than others (more on this in Topic 5).

Mostly through two tools working together: taxation (raising money) and spending (redistributing that money and providing services). It's really a two-step loop:

1. Tax people and firms — income tax, corporation tax, VAT, tariffs on imports, inheritance tax, etc.
2. Spend that revenue to redistribute income (via a welfare system — unemployment benefits, healthcare, pensions) and to fund infrastructure, merit goods (like schools) and public goods (like national defence).

This is the single most important distinction in the whole chapter, so let's nail it precisely.

Watch out: some public sector firms are partially owned by private shareholders (less than 50%), with government holding the majority. Ownership isn't always a clean 100/0 split.

A firm's "aim" is the reason it exists or the focus its owners have chosen. There are six you need to know:

1. Profit Maximisation — the "rational" default objective. Profit = Total Revenue − Total Costs. Firms either raise revenue or cut costs to grow this gap.
2. Growth — focusing on sales revenue, market share, or output, partly to benefit from economies of scale and partly because a bigger firm is less likely to fail.
3. Survival — the priority for new firms. Around 25% of new firms fail in their first year, so early-stage businesses often accept low or zero profit just to stay alive. Once established, many pivot back to profit maximisation.
4. Social Welfare — increasingly common; firms focus on climate action, poverty, or inequality. They still need some profit to survive, but accept less than a pure profit-maximiser would.
5. State Provision — public sector aim: provide goods/services that would be under-provided (or not provided at all) by a free market, e.g. street lighting, elderly social care, education.
6. Generate a Surplus — some public organisations (BBC, Channel 4) aim to generate a surplus, which gets reinvested into services or returned to government — not the same as "profit maximisation" because the goal isn't to enrich shareholders.

Every economic system exists to solve the same underlying problem: scarcity — unlimited wants, limited resources. Different economic agents (consumers, producers, government, and special interest groups like trade unions or environmental groups) interact to allocate the scarce factors of production (land, labour, capital, enterprise).

There are three main systems: free market, mixed economy, and planned economy. What actually separates them is how each one answers the same three questions.

Picture it as a flow: Resources → Allocation → Producers → Distribution of Output → Households. Along that flow, every economy must decide:

1. What to produce? — Because resources are limited, every choice has an opportunity cost. More hospitals or better rail services? You can't have unlimited amounts of both.
2. How to produce it? — Labour-intensive (more workers, more jobs) or capital-intensive (more machinery, often more efficient)?
3. Who to produce it for? — Only for those who can afford it, or freely available to everyone regardless of income?

In a free market, the price mechanism usually does a great job matching what people want with what gets produced. But sometimes it breaks down — this is called market failure: a situation where resources are allocated in a way that's less than optimal from society's point of view. If resources were reallocated differently, either more useful output could be produced, or the outcome would be fairer / less environmentally damaging.

There are six main causes of market failure. Think of them as six different ways the price mechanism "gets it wrong."

1. Demerit Goods — goods that are harmful to consumers or society, often addictive (gambling, alcohol, drugs, sugary food/drinks). The free market tends to over-provide them because their consumption creates external costs that aren't reflected in the price. Government response: regulate — raise prices (tax) or limit quantities (bans, age restrictions).

2. Merit Goods — goods that are beneficial to society but consumers under-consume because they don't fully recognise the private or external benefits (vaccinations, education, electric cars). The market under-provides them. Government response: subsidise to lower the price or boost the quantity consumed.

3. Public Goods — beneficial to society but the free market provides none at all, because there's no way for a private firm to profit from them. This is such a big idea it gets its own topic below (Topic 4).

4. Abuse of Monopoly Power — monopoly markets form naturally in a free market system as firms buy out competitors and accumulate factors of production. With less competition, firms can raise prices, reduce choice, or limit supply — deliberately under-providing to boost profits. Government response: regulate to ensure healthy competition and sufficient provision (e.g. competition authorities, breaking up monopolies).

5. Factor Immobility — when factors of production (especially labour) struggle to move or switch between uses/locations. Two types:

• Geographical immobility — workers can't easily relocate (housing costs, family ties).
• Occupational immobility — workers can't easily switch industries (lack of transferable skills/training).

This causes inefficient allocation (usually under-provision in growing industries). Government response: retraining programmes, relocation support when an industry collapses in a region.

6. Externalities — costs or benefits that spill onto a third party not involved in the original transaction. Can be positive (e.g. vaccination protecting others) or negative (e.g. factory pollution harming nearby residents). The price mechanism in a free market ignores these — if it acknowledged them, price and output would be different. Government response: subsidise goods with positive externalities; tax or regulate goods with negative externalities.

To understand public goods properly, first understand private goods: these are goods firms can profit from because they are excludable (a firm can stop you buying if you don't pay) and rivalrous (one person consuming it means less is available for someone else — creating competition that keeps prices/profits up).

Public goods (roads, parks, lighthouses, national defence, street lighting) are the opposite on both counts:

• Non-excludable — a private firm cannot stop someone using the good even if they haven't paid. You can't build a fence around "national defence" and only protect the people who paid.
• Non-rivalrous — one person's use doesn't reduce availability for anyone else. Street lighting doesn't "run out" because more people walk under it.

Because private firms can't make a profit providing these, the free market provides none at all — this is a more extreme case than merit goods (which are merely under-provided).

Imagine a private firm decides to install street lighting and charge local residents a fee. Here's what happens:

1. Because the good is non-excludable, people quickly realise they can walk under the lights without paying.
2. Paying customers notice they can stop paying and still enjoy the benefit — they start "free-riding" on those who continue to pay.
3. Over time, more and more people stop paying, since there's no penalty for not paying.
4. Eventually revenue collapses and the firm ceases to provide the good — meaning it becomes under-provided (or not provided at all) in society.

Every mixed economy blends public and private provision — but the ratio varies enormously by country.

• Smaller public sector (leans free market): USA, Japan. E.g. in the US, private firms often provide education and healthcare.
• Larger public sector (more government control): Cuba, China. Government exerts high control over banking, airlines, communications, energy, and manufacturing.

The chapter includes a bar chart comparing public sector employees per 1,000 population across countries over time (1985–2015). The pattern to remember:

• Nordic countries (Norway, Denmark, Sweden, Finland) sit at the top — large public sectors, heavy spending on merit/public goods, and consistently rank highly on quality of life indexes thanks to strong education and healthcare systems.
• UK and USA sit lower — smaller public sectors, less revenue directed towards merit/public goods, and correspondingly rank lower on quality of life indexes for education/healthcare spending.

These two terms are opposites, and IGCSE exams love testing whether you can tell them apart under pressure — so let's be crystal clear:

Privatising something like water utilities is ethically trickier than privatising an airline, because everyone needs water — there's no real "choice" to opt out.

• Argument for: Private firms are often more efficient and can invest large sums into infrastructure, improving service quality.
• Argument against: The profit motive can push water bills up, disproportionately hurting low-income households who can't easily switch to an alternative supplier.
• The fix: Government must regulate private water firms to guarantee equitable access — without regulation, firms may neglect non-profitable parts of the network (e.g. rural areas that cost more to service).

What examiners are really looking for:

• Precise use of key terms — "non-excludable" and "non-rivalrous" must both appear when discussing public goods.
• Real-world examples applied correctly (BT, British Rail, Northern Rock, BBC) — don't just state definitions, apply them.
• Clear cause → government response chains for each type of market failure (e.g. negative externality → tax/regulation).
• Balanced evaluation with a final judgement, especially in "assess" or "evaluate" style questions worth 6+ marks.
• Linking public sector size to quality of life and tax levels — never just one side of that trade-off.