📚 IGCSE AQA Economics: Final Revision Checklist | IGCSE AQA 经济：期末复习提纲
This revision checklist covers all the key topics for the AQA IGCSE Economics examination. Use it to test your knowledge, identify gaps, and structure your final review. Each section pairs core concepts in English and Chinese to reinforce your bilingual understanding.
这份复习提纲覆盖了 AQA IGCSE 经济学考试的全部核心主题。你可以用它来检测自己的知识掌握情况、找出薄弱环节，并规划最终的复习节奏。每一部分都以中英双语对照呈现核心概念，帮助你加深理解。
1. The Basic Economic Problem | 基本经济问题
The fundamental economic problem is scarcity: unlimited wants but limited resources. This forces individuals, firms, and governments to make choices, leading to opportunity cost—the value of the next best alternative forgone.
基本经济问题是稀缺性：无限的需求与有限的资源之间的矛盾。这迫使个人、企业和政府做出选择，从而产生机会成本——所放弃的次优选择的价值。
The three key economic questions are: What to produce? How to produce? For whom to produce? Different economic systems answer these questions differently, with the main types being market, command, and mixed economies.
三个关键的经济问题是：生产什么？如何生产？为谁生产？不同的经济体制以不同方式回答这些问题，主要的类型有市场经济、计划经济和混合经济。
Production possibility curves (PPCs) illustrate maximum output combinations of two goods. Points inside the curve show underutilisation of resources, points on the curve indicate efficiency, and outward shifts represent economic growth.
生产可能性曲线（PPC）展示两种商品的最大产出组合。曲线内的点表示资源未被充分利用，曲线上的点表示有效率，曲线向外移动则代表经济增长。
2. Demand, Supply and Equilibrium | 需求、供给与均衡
Demand is the quantity of a good that consumers are willing and able to buy at various prices. The law of demand states that, ceteris paribus, as price falls, quantity demanded rises. A movement along the demand curve is caused by a change in price, while shifts are due to factors like income, tastes, prices of substitutes or complements.
需求是指消费者在各种价格水平下愿意并能够购买的商品数量。需求定律指出，在其他条件不变的情况下，价格下跌时需求量上升。价格变化引起沿需求曲线的移动，而收入、偏好、替代品或互补品价格等因素会导致需求曲线平移。
Supply is the quantity producers are willing and able to offer for sale. The law of supply says that higher prices generally increase quantity supplied. Shifts in supply result from changes in costs of production, technology, taxes, subsidies, or the number of sellers.
供给是生产者在各价格下愿意并能够出售的数量。供给定律表明，价格越高，供给量通常越大。生产成本、技术、税收、补贴或卖家数量的变化会引起供给曲线平移。
Market equilibrium occurs where demand equals supply, determining the equilibrium price and quantity. Disequilibrium leads to excess supply (surplus) or excess demand (shortage). Price mechanism allocates resources by signalling to producers and consumers.
市场均衡在需求量等于供给量处实现，决定了均衡价格和数量。非均衡会导致超额供给（过剩）或超额需求（短缺）。价格机制通过向生产者和消费者传递信号来配置资源。
3. Elasticity | 弹性
Price elasticity of demand (PED) measures responsiveness of quantity demanded to a change in price. Formula: PED = % change in quantity demanded ÷ % change in price. Values: perfectly inelastic (0), inelastic (between 0 and –1), unitary (–1), elastic (less than –1), perfectly elastic (–∞). Determinants include availability of substitutes, necessity vs luxury, proportion of income, and time.
需求价格弹性（PED）衡量需求量对价格变动的反应程度。公式：PED = 需求量变动百分比 ÷ 价格变动百分比。数值含义：完全无弹性（0）、缺乏弹性（介于 0 和 –1 之间）、单位弹性（–1）、富有弹性（小于 –1）、完全弹性（–∞）。影响因素包括替代品的可得性、必需品或奢侈品、支出占收入的比例以及时间。
Price elasticity of supply (PES) measures responsiveness of quantity supplied to price changes. PES = % change in quantity supplied ÷ % change in price. Key influences are production time, spare capacity, stock levels, and ease of factor substitution.
供给价格弹性（PES）衡量供给量对价格变动的反应程度。公式：PES = 供给量变动百分比 ÷ 价格变动百分比。主要影响因素有生产周期、闲置产能、库存水平以及生产要素转换的难易程度。
Income elasticity of demand (YED): % change in demand ÷ % change in income. Normal goods have positive YED; inferior goods have negative YED. Cross elasticity of demand (XED) measures the effect of price change of one good on demand for another: positive for substitutes, negative for complements.
需求收入弹性（YED）：需求量变动百分比 ÷ 收入变动百分比。正常品的 YED 为正，劣质品的 YED 为负。需求交叉弹性（XED）衡量一种商品价格变化对另一种商品需求的影响：替代品为正，互补品为负。
| Elasticity type | 弹性类型 | Formula | 公式 | Interpretation | 解释 |
|---|---|---|
| PED | %ΔQD ÷ %ΔP | PED < –1 : elastic; > –1 : inelastic |
| PES | %ΔQS ÷ %ΔP | PES > 1 : elastic; < 1 : inelastic |
| YED | %ΔQD ÷ %ΔY | Positive: normal good; negative: inferior |
| XED | %ΔQD(A) ÷ %ΔP(B) | Positive: substitutes; negative: complements |
4. Market Failure and Government Intervention | 市场失灵与政府干预
Market failure occurs when the price mechanism fails to allocate resources efficiently. Key causes: externalities (positive and negative), public goods (non-excludable, non-rival), merit and demerit goods, information gaps, monopoly power, and factor immobility.
当价格机制无法有效率地配置资源时，就出现了市场失灵。主要原因包括：外部性（正和负）、公共品（非排他、非竞争）、优效品和劣效品、信息不对称、垄断势力以及要素不流动性。
Negative externalities lead to overproduction because private costs are lower than social costs. Positive externalities cause underproduction since private benefits are less than social benefits. Diagrams must show marginal social cost (MSC) vs marginal private cost (MPC), or marginal social benefit (MSB) vs marginal private benefit (MPB).
负外部性导致生产过剩，因为私人成本低于社会成本。正外部性导致生产不足，因为私人收益低于社会收益。作图时需要展示边际社会成本（MSC）与边际私人成本（MPC），或边际社会收益（MSB）与边际私人收益（MPB）。
Government interventions include indirect taxes (to internalise external costs), subsidies (for merit goods), price controls (maximum/minimum prices), tradable pollution permits, state provision of public goods, and regulation. Evaluate each measure for effectiveness, cost, and unintended consequences.
政府干预手段包括间接税（以内部化外部成本）、补贴（用于优效品）、价格管制（最高/最低限价）、可交易的污染许可证、政府直接提供公共品以及法规监管。需要对每种措施的有效性、成本以及意外后果进行评价。
5. Production, Costs and Revenue | 生产、成本与收入
Production converts inputs (factors of production: land, labour, capital, enterprise) into outputs. Productivity measures output per unit of input. Specialisation and division of labour can increase productivity but may reduce worker motivation.
生产是将投入（生产要素：土地、劳动、资本、企业家才能）转化为产出的过程。生产率衡量每单位投入的产出。专业化和劳动分工可以提高生产率，但可能削弱工人的积极性。
Costs: fixed costs (do not vary with output, e.g. rent), variable costs (change with output, e.g. raw materials), total cost = fixed + variable. Average cost = total cost ÷ output. Economies of scale reduce average costs as output expands; diseconomies of scale raise them.
成本：固定成本（不随产量变化，如租金）、可变成本（随产量变化，如原材料），总成本 = 固定成本 + 可变成本。平均成本 = 总成本 ÷ 产量。规模经济随着产量扩大而降低平均成本；规模不经济则导致平均成本上升。
Revenue: total revenue = price × quantity sold. Average revenue = total revenue ÷ quantity = price. Marginal revenue is the additional revenue from selling one more unit. Profit maximisation occurs where marginal cost = marginal revenue (MC=MR).
收入：总收入 = 价格 × 销量。平均收入 = 总收入 ÷ 数量 = 价格。边际收入是销售额外一单位产品所带来的收入增量。利润最大化在边际成本等于边际收入（MC=MR）处实现。
6. Market Structures | 市场结构
Market structures range from perfect competition to monopoly, mainly differentiated by number of firms, barriers to entry, product homogeneity, and price-setting power.
市场结构从完全竞争到垄断不等，主要因厂商数量、进入壁垒、产品同质性和定价能力的不同而区分。
| Structure | 结构 | No. of firms | 厂商数量 | Barriers to entry | 进入壁垒 | Product | 产品 | Price influence | 价格影响力 |
|---|---|---|---|---|
| Perfect competition | 完全竞争 | Many | 很多 | None | 无 | Homogeneous | 同质 | Price taker | 价格接受者 |
| Monopoly | 垄断 | One | 一个 | High | 高 | Unique | 独特 | Price maker | 价格制定者 |
| Oligopoly | 寡头垄断 | Few | 少数 | High | 高 | Differentiated or homogeneous | 差异化或同质 | Interdependent | 相互依赖 |
Monopoly can lead to higher prices, lower output, and loss of allocative efficiency. However, advantages include dynamic efficiency through R&D and economies of scale. Governments may regulate monopolies via price caps, windfall taxes, or promoting competition.
垄断可能导致价格更高、产出更低和配置效率损失。然而，其优势包括通过研发实现的动态效率和规模经济。政府可能通过价格上限、暴利税或促进竞争来监管垄断。
7. Macroeconomic Objectives | 宏观经济目标
The main government macroeconomic objectives are: low and stable inflation (target around 2%), sustainable economic growth, low unemployment, and a balanced current account on the balance of payments. Additionally, less inequality and environmental sustainability are often included.
政府的主要宏观经济目标包括：低且稳定的通货膨胀（目标约为 2%）、可持续的经济增长、低失业率、国际收支经常账户的平衡。此外，减少不平等和环境可持续性也常被列入。
Economic growth is measured by the percentage change in real GDP. Inflation is measured by the Consumer Price Index (CPI) or Retail Price Index (RPI). Unemployment is measured by the claimant count or the Labour Force Survey (ILO measure).
经济增长通过实际 GDP 的百分比变化来衡量。通货膨胀通过消费者价格指数（CPI）或零售价格指数（RPI）衡量。失业通过申领失业救济人数或劳动力调查（ILO 标准）来衡量。
Conflicts can arise between objectives, for example, growth may increase inflation (trade-off illustrated by the Phillips curve in the short run), or reducing unemployment may worsen the current account deficit. Policy makers must prioritise.
目标之间可能存在冲突，例如，增长可能推高通胀（短期菲利普斯曲线表明此权衡），或者降低失业可能使经常账户赤字恶化。政策制定者必须进行优先取舍。
8. Government Macroeconomic Policies | 政府宏观经济政策
Fiscal policy involves government spending and taxation to influence aggregate demand. Expansionary fiscal policy (higher spending/lower taxes) boosts growth; contractionary fiscal policy (lower spending/higher taxes) reduces inflation. Government budget can be in surplus, deficit, or balanced.
财政政策通过政府支出和税收来影响总需求。扩张性财政政策（增加支出/减税）刺激增长；紧缩性财政政策（减少支出/增税）抑制通货膨胀。政府预算可能出现盈余、赤字或平衡。
Monetary policy controls money supply and interest rates, usually operated by the central bank. Lower interest rates encourage borrowing and spending, increasing AD; higher rates do the opposite. Quantitative easing is used when rates are near zero.
货币政策控制货币供应量和利率，通常由中央银行执行。降低利率会鼓励借贷和支出，增加总需求；提高利率则相反。当利率接近零时，可以使用量化宽松。
Supply-side policies aim to increase the productive capacity of the economy. Examples: education and training, infrastructure investment, deregulation, tax reforms, and labour market flexibility. These shift the long-run aggregate supply (LRAS) curve to the right.
供给侧政策旨在提高经济的生产能力。例如：教育和培训、基础设施投资、放松管制、税制改革以及劳动力市场灵活性。这些政策使长期总供给（LRAS）曲线向右移动。
9. International Trade and Globalisation | 国际贸易与全球化
Countries trade to obtain goods they cannot produce efficiently themselves. The theory of comparative advantage states that countries should specialise in goods with the lowest opportunity cost and trade for others. Benefits: lower prices, greater variety, economies of scale, and technology transfer.
国家进行贸易是为了获得自己无法高效生产的商品。比较优势理论认为，各国应专门生产机会成本最低的商品，并通过贸易换取其他商品。好处包括：更低的价格、更多的种类、规模经济和技术转让。
Protectionism restricts trade via tariffs, quotas, subsidies to domestic producers, and non-tariff barriers. Arguments for protectionism include protecting infant industries, preventing dumping, preserving jobs, and national security. However, it raises prices and reduces choice.
贸易保护主义通过关税、配额、对国内生产者的补贴以及非关税壁垒来限制贸易。支持保护主义的理由包括保护幼稚产业、防止倾销、保护就业和国家安全。然而，这会提高价格并减少选择。
Globalisation refers to the increasing integration of economies worldwide through trade, capital flows, technology, and labour movement. It is driven by reduced transport costs, trade liberalisation, and TNC growth. Impacts can be both positive (growth, poverty reduction) and negative (inequality, environmental damage).
全球化是指通过贸易、资本流动、技术和劳动力移动使世界经济日益一体化的过程。其驱动力包括运输成本降低、贸易自由化和跨国公司扩张。影响既可以是积极的（增长、减贫），也可以是消极的（不平等、环境破坏）。
10. Exchange Rates | 汇率
An exchange rate is the price of one currency in terms of another. It can be determined by market forces (floating), fixed by the government, or managed (dirty float). Appreciation means the currency strengthens; depreciation means it weakens.
汇率是一种货币以另一种货币表示的价格。它可由市场力量决定（浮动汇率）、由政府固定（固定汇率）或进行管理（有管理的浮动）。升值意味着该货币走强；贬值则意味着走弱。
Exchange rate changes affect trade: a depreciation makes exports cheaper and imports dearer, improving trade balance if the Marshall-Lerner condition holds (sum of PED for exports and imports > 1). An appreciation has the opposite effect.
汇率变动影响贸易：本币贬值使得出口更便宜、进口更昂贵，如果马歇尔-勒纳条件成立（出口和进口需求弹性之和大于 1），则贸易收支改善。升值的影响则相反。
Factors influencing exchange rates include interest rates, inflation, current account position, speculation, and political stability. Higher interest rates attract hot money inflows, causing appreciation.
影响汇率的因素包括利率、通货膨胀、经常账户状况、投机活动和政治稳定性。较高的利率会吸引热钱流入，导致本币升值。
11. Economic Development | 经济发展
Economic development is a broader concept than economic growth; it includes improvements in living standards, health, education, and reduction of poverty. Human Development Index (HDI) combines life expectancy, education, and GNI per capita.
经济发展比经济增长更宽泛，它包括生活水平、健康、教育的改善以及贫困的减少。人类发展指数（HDI）综合了预期寿命、教育和人均 GNI。
Obstacles to development include: primary product dependency, savings and investment gaps, poor infrastructure, corruption, conflict, debt, and lack of access to credit and technology. Policies to promote development: aid, trade liberalisation, FDI, microfinance, and good governance.
发展的障碍包括：初级产品依赖、储蓄和投资缺口、基础设施落后、腐败、冲突、债务以及缺乏信贷和技术获取渠道。促进发展的政策有：援助、贸易自由化、外国直接投资（FDI）、小额信贷和良政。
12. Exam Technique and Key Diagrams | 考试技巧与关键图表
Always define key terms in your answers, even if not explicitly asked. Use diagrams accurately—label axes, curves, and equilibrium points. For “evaluate” questions, provide both sides of the argument and a reasoned conclusion.
无论题目是否明确要求，始终在答案中定义关键术语。准确使用图表——标注坐标轴、曲线和均衡点。对于“评价”类问题，要呈现正反两面论据并给出有理有据的结论。
Essential diagrams to master: demand and supply (shifts and equilibrium), PPC, externalities (negative production, positive consumption), costs and revenue curves for monopoly vs perfect competition, AD/AS model (including LRAS shift), and the multiplier effect.
需要熟练掌握的基本图表：需求与供给（平移与均衡）、生产可能性曲线、外部性（负生产外部性、正消费外部性）、垄断与完全竞争的成本和收入曲线、总需求-总供给模型（包含 LRAS 移动）以及乘数效应。
Stay updated with real-world economic contexts—examples can boost your evaluation marks. Time management: spend roughly one minute per mark, and leave time for final review.
关注现实经济背景——实例能为你的评价部分加分。时间管理：大约每分钟对应一分，留出最后检查的时间。
Published by TutorHao | Economics Revision Series | aleveler.com
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