IGCSE CCEA Economics: End-of-Term Revision Guide | IGCSE CCEA 经济：期末复习提纲

📚 IGCSE CCEA Economics: End-of-Term Revision Guide | IGCSE CCEA 经济：期末复习提纲

As the term draws to a close, effective revision is essential for mastering the IGCSE CCEA Economics syllabus. This guide brings together the key concepts, definitions, diagrams and analysis points, helping you focus on what matters most. Whether you are reviewing market mechanics or tackling macroeconomic policies, a structured recap will strengthen your understanding and exam confidence.

学期临近结束，高效复习是掌握 IGCSE CCEA 经济大纲的关键。本提纲汇总了核心概念、定义、图表和分析要点，助你抓住重点。无论你是在回顾市场机制还是攻克宏观经济政策，系统性的重温都将加深理解，提升应试信心。

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1. The Basic Economic Problem | 基本经济问题

Scarcity is the central economic problem: finite resources but infinite wants. This forces every economy to answer three fundamental questions — what to produce, how to produce and for whom to produce. The need to choose gives rise to opportunity cost, which is the value of the next best alternative sacrificed when a decision is made.

稀缺性是核心经济问题：有限资源面对无限欲望。这迫使每个经济体回答三个基本问题——生产什么、如何生产、为谁生产。需要做出选择便产生了机会成本，即做出决定时所放弃的次优选项的价值。

The four factors of production — land, labour, capital and enterprise — are the resources used to create goods and services. Land includes natural resources, labour is human effort, capital refers to manufactured aids for production, and enterprise is the willingness to take risks and organise the other factors. Each factor earns a reward: rent, wages, interest and profit respectively.

四大生产要素——土地、劳动力、资本和企业——是用于创造商品和服务的资源。土地包括自然资源，劳动力是人力付出，资本指人造的生产工具，企业则是承担风险和组织其他要素的能力。每种要素获得相应的回报：地租、工资、利息和利润。

The production possibility frontier (PPF) illustrates the maximum combination of two goods an economy can produce with given resources and technology. Points on the curve represent efficient use; points inside show unemployment or inefficiency. An outward shift of the PPF indicates economic growth, often driven by investment or technological progress.

生产可能性边界 (PPF) 展示了一个经济体在给定资源与技术下能够生产的两种商品的最大组合。曲线上的点代表有效利用，内部的点表明失业或低效率。PPF 向外移动表示经济增长，通常由投资或技术进步推动。

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2. Demand and Supply | 需求与供给

Demand refers to the quantity of a good or service that consumers are willing and able to purchase at various prices over a given period. The law of demand states that, ceteris paribus, as price falls, quantity demanded rises. A change in price causes a movement along the demand curve, while changes in non-price factors — such as income, tastes, the price of substitutes or complements, and advertising — shift the entire curve.

需求指在一定时期内，消费者在不同价格水平下愿意且能够购买的商品或服务数量。需求定律表明，在其他条件不变时，价格下降则需求量上升。价格变动引起沿需求曲线的移动，而非价格因素——如收入、偏好、替代品或互补品价格以及广告——的变化会导致整条需求曲线移动。

Supply is the quantity producers are willing and able to sell at various prices. The law of supply states that as price rises, quantity supplied rises. The supply curve can shift due to changes in production costs, technology, indirect taxes, subsidies, the number of sellers, or external shocks such as weather.

供给是生产者在不同价格下愿意且能够出售的数量。供给定律指出，价格上升，供给量增加。供给曲线可能因生产成本、技术、间接税、补贴、卖方数量或天气等外部冲击的变化而发生移动。

Market equilibrium occurs where quantity demanded equals quantity supplied (Qd = Qs). At this price, there is no tendency for change. If the market price is set above equilibrium, a surplus (excess supply) emerges; if below, a shortage (excess demand) puts upward pressure on price.

市场均衡发生在需求量等于供给量时（Qd = Qs）。在此价格下，没有变动的趋势。若市场价格高于均衡，则出现过剩（超额供给）；若低于均衡，短缺（超额需求）会给价格带来上行压力。

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3. Elasticity | 弹性

Price elasticity of demand (PED) measures the responsiveness of quantity demanded to a change in price. It is calculated as the percentage change in quantity demanded divided by the percentage change in price. Demand is elastic when PED > 1, inelastic when PED < 1, and unitary when PED = 1. Perfectly elastic demand is shown as a horizontal line, while perfectly inelastic demand is vertical.

需求价格弹性 (PED) 衡量需求量对价格变动的反应程度。计算方式为需求量变动的百分比除以价格变动的百分比。当 PED > 1 时需求富有弹性，PED < 1 时缺乏弹性，PED = 1 时为单位弹性。完全弹性的需求表现为水平线，完全无弹性的需求则为垂直线。

Determinants of PED include the availability of close substitutes, whether the good is a necessity or a luxury, the proportion of income spent on the good, and the time period considered. The relationship between PED and total revenue is critical: if demand is elastic, a price cut will increase total revenue; if demand is inelastic, raising price will boost total revenue.

PED 的决定因素包括相近替代品的可获得性、商品是必需品还是奢侈品、支出占收入的比例以及所考虑的时间跨度。PED 与总收益的关系至关重要：若需求富有弹性，降价会增加总收益；若缺乏弹性，提价则会增加总收益。

Income elasticity of demand (YED) measures the responsiveness of demand to a change in income (YED = %ΔQd ÷ %ΔY). Normal goods have a positive YED; inferior goods have a negative YED. Price elasticity of supply (PES) measures how responsive quantity supplied is to a price change (PES = %ΔQs ÷ %ΔP). Its key determinants are the time period, the level of spare capacity, and the ease of storing inventory.

需求收入弹性 (YED) 衡量需求对收入变化的反应程度（YED = 需求量变化% ÷ 收入变化%）。正常品 YED 为正，低档品 YED 为负。供给价格弹性 (PES) 衡量供给量对价格变化的反应程度（PES = 供给量变化% ÷ 价格变化%），主要决定因素包括时间长短、闲置产能水平以及库存存储的难易程度。

Elasticity	弹性	Formula	公式	Key Insight	关键点
PED	需求价格弹性	%ΔQd ÷ %ΔP	%ΔQd ÷ %ΔP	Affects total revenue	影响总收益
YED	需求收入弹性	%ΔQd ÷ %ΔY	%ΔQd ÷ %ΔY	Normal > 0, Inferior < 0	正常品为正，低档品为负
PES	供给价格弹性	%ΔQs ÷ %ΔP	%ΔQs ÷ %ΔP	Time period critical	时间长短很关键

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4. Market Failure | 市场失灵

Market failure occurs when the free market fails to allocate resources efficiently, leading to a net welfare loss. Common types include negative and positive externalities, public goods, information gaps, monopoly power and factor immobility. When social costs exceed private costs, or social benefits exceed private benefits, the market outcome is suboptimal.

市场失灵发生在自由市场未能有效配置资源时，导致净福利损失。常见类型包括负外部性与正外部性、公共品、信息缺口、垄断力量和要素不流动。当社会成本超过私人成本，或社会收益超过私人收益时，市场结果便不是最优的。

A negative production externality, such as factory pollution, means the social cost of production is higher than the private cost. A positive consumption externality, like education, gives society a benefit greater than the private benefit. In both cases, without intervention there will be over-production or under-consumption relative to the social optimum.

负生产外部性，例如工厂污染，意味着生产的社会成本高于私人成本。正消费外部性，如教育，给社会带来的收益大于私人收益。在这两种情况下，若无干预，就会相对于社会最优水平出现过度生产或消费不足。

Public goods are non-excludable and non-rival. Street lighting and national defence are classic examples — one person’s use does not reduce availability for others, and it is impossible to prevent free riders. Markets tend not to provide these goods, so government provision is often necessary.

公共品具有非排他性和非竞争性。路灯和国防是典型例子——一个人的使用不会减少他人的可得性，且无法阻止免费搭车者。市场通常不会提供这些商品，因此政府提供往往是必要的。

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5. Government Intervention | 政府干预

Governments intervene to correct market failure using a range of tools: indirect taxation to internalise external costs, subsidies to encourage merit goods, regulation to ban or limit harmful activities, and price controls (maximum or minimum prices). Tradable pollution permits create market-based incentives to reduce emissions.

政府通过各种工具干预以纠正市场失灵：间接税用于内部化外部成本、补贴鼓励优值品、法规禁止或限制有害活动、以及价格控制（最高或最低价格）。可交易污染许可证为减排创造了基于市场的激励。

A maximum price (price ceiling) is set below the equilibrium to keep essentials affordable, but it can create persistent shortages. A minimum price (price floor) set above equilibrium protects producers, often leading to surpluses. Intervention aims to improve equity or efficiency, but policymakers must consider potential side effects.

最高价格（价格上限）设定在均衡之下以保持必需品可负担，但可能造成持续短缺。最低价格（价格下限）设定在均衡之上以保护生产者，往往导致过剩。干预旨在改善公平或效率，但决策者须考虑潜在的副作用。

Government failure can arise when intervention creates unintended consequences, such as excessive bureaucracy, distorted market signals, or reduced incentives to work and invest. Policy design must therefore weigh the benefits of correction against the risks of

Published by TutorHao | IGCSE Economics Revision Series | aleveler.com

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