📚 IGCSE CIE Economics: End-of-Term Revision Outline | IGCSE CIE 经济：期末复习提纲
This end-of-term revision outline covers all the essential topics for the IGCSE CIE Economics syllabus. Use it to check your understanding of key concepts, practise diagrams and formulas, and focus your revision on the most exam-relevant areas. Each section is presented in both English and Chinese for effective bilingual learning.
这份期末复习提纲覆盖了 IGCSE CIE 经济学教学大纲的全部核心主题。你可以用它来检查自己对关键概念的理解，练习图表和公式，并把复习重点放在最常考的内容上。每个部分都以中英双语呈现，帮助你高效进行双语学习。
1. The Basic Economic Problem | 基本经济问题
The fundamental economic problem arises because resources are scarce while human wants are unlimited. This forces individuals, firms and governments to make choices and incur opportunity cost — the next best alternative forgone.
基本经济问题产生的原因是资源稀缺而人的欲望无限。这就迫使个人、企业和政府做出选择，并承担机会成本——即所放弃的次优选择。
The three basic economic questions are: What to produce? How to produce? For whom to produce? These questions are answered differently in market, mixed and planned economies.
三个基本经济问题是：生产什么？如何生产？为谁生产？在市场经济、混合经济和计划经济中，对这些问题的回答方式各不相同。
Factors of production — land, labour, capital and enterprise — earn rewards: rent, wages, interest and profit respectively. Their mobility and productivity influence an economy’s capacity to produce goods and services.
生产要素——土地、劳动、资本和企业家才能——分别获得租金、工资、利息和利润作为报酬。要素的流动性和生产率影响着一个经济体生产商品和服务的能力。
The production possibility curve (PPC) illustrates scarcity, choice, opportunity cost and efficiency. A movement along the PPC shows reallocation of resources; an outward shift represents economic growth.
生产可能性曲线（PPC）展示了稀缺性、选择、机会成本和效率。沿着 PPC 的移动表示资源的重新配置；整条曲线向外移动则代表经济增长。
2. Demand, Supply and Market Equilibrium | 需求、供给与市场均衡
The law of demand states that, ceteris paribus, as the price of a good increases, the quantity demanded decreases. This results in a downward-sloping demand curve. Factors that shift the demand curve include income, tastes, prices of related goods (substitutes and complements), and population.
需求定律指出，在其他条件不变的情况下，商品价格上升时，需求量下降。这形成了一条向下倾斜的需求曲线。导致需求曲线位移的因素包括收入、偏好、相关商品（替代品和互补品）的价格以及人口。
The law of supply states that, ceteris paribus, as the price of a good increases, the quantity supplied increases, producing an upward-sloping supply curve. Supply can shift due to changes in production costs, technology, taxes, subsidies, weather and the number of sellers.
供给定律指出，在其他条件不变的情况下，价格上升，供给量增加，形成向上倾斜的供给曲线。供给曲线会因生产成本、技术、税收、补贴、天气和卖者数量的变化而位移。
Market equilibrium occurs where quantity demanded equals quantity supplied. A price above equilibrium creates a surplus, exerting downward pressure on price; a price below equilibrium creates a shortage, pushing price upward. These market forces restore equilibrium automatically.
市场均衡出现在需求量等于供给量之处。高于均衡价格会产生过剩，对价格施加下行压力；低于均衡价格则产生短缺，推动价格上行。这些市场力量会自动恢复均衡。
Remember the distinction between a movement along the curve (caused by a change in the good’s own price) and a shift of the curve (caused by a change in any other determinant). This is frequently tested in multiple‑choice and structured questions.
要记住沿着曲线移动（由商品自身价格变动引起）与整条曲线位移（由任何一个其他决定因素变动引起）的区别。这是选择题和简答题中经常出现的考点。
3. Elasticities | 弹性
Price elasticity of demand (PED) measures the responsiveness of quantity demanded to a change in price.
PED = %ΔQd ÷ %ΔP
需求价格弹性（PED）衡量需求量对价格变动的反应程度。
PED = %ΔQd ÷ %ΔP
PED values: perfectly inelastic (0), inelastic (0–1), unitary (1), elastic (>1), perfectly elastic (∞). Determinants include the availability of close substitutes, degree of necessity, proportion of income spent, and time period. PED affects total revenue: if demand is elastic, a price rise lowers total revenue; if inelastic, a price rise raises total revenue.
PED 值：完全无弹性(0)、缺乏弹性(0–1)、单位弹性(1)、富有弹性(>1)、完全弹性(∞)。决定因素包括密切替代品的可获得性、必需程度、支出占收入的比例以及时间长短。PED 影响总收益：如果需求富有弹性，涨价会降低总收益；如果缺乏弹性，涨价则提高总收益。
Price elasticity of supply (PES) measures the responsiveness of quantity supplied to a change in price.
PES = %ΔQs ÷ %ΔP
供给价格弹性（PES）衡量供给量对价格变动的反应程度。
PES = %ΔQs ÷ %ΔP
Key determinants of PES: production time, availability of spare capacity, perishability of the product, and the ease of storing stocks. Supply is typically more elastic in the long run than in the short run.
决定 PES 的关键因素：生产时间、闲置产能的可用性、产品的易腐性以及储存的便利性。通常长期供给弹性大于短期。
Income elasticity of demand (YED) = %ΔQd ÷ %ΔY. Normal goods have positive YED; luxury goods have YED > 1, while necessities have YED between 0 and 1. Inferior goods have negative YED. Cross elasticity of demand (XED) = %ΔQd of good A ÷ %ΔP of good B. Substitutes have positive XED, complements have negative XED.
需求的收入弹性（YED）= %ΔQd ÷ %ΔY。正常商品的 YED 为正；奢侈品的 YED > 1，必需品的 YED 在 0 和 1 之间。低档商品的 YED 为负。需求的交叉弹性（XED）= 商品 A 需求量的 %Δ ÷ 商品 B 价格的 %Δ。替代品 XED 为正，互补品 XED 为负。
A quick summary table helps memorise the elasticity ranges:
| Type | Formula | Interpretation |
|---|---|---|
| PED | %ΔQd / %ΔP | |PED| > 1 elastic; < 1 inelastic |
| PES | %ΔQs / %ΔP | > 1 elastic; < 1 inelastic |
| YED | %ΔQd / %ΔY | + normal; – inferior |
| XED | %ΔQd(A) / %ΔP(B) | + substitutes; – complements |
请注意，弹性计算中始终使用百分比变化，而非绝对变化，并且 PED 通常取其绝对值（忽略负号）以方便比较。
4. Market Failure and Government Intervention | 市场失灵与政府干预
Market failure occurs when the free market fails to allocate resources efficiently, leading to a net welfare loss. It can result from externalities, public goods, information gaps, and market power.
市场失灵是指自由市场未能有效配置资源，导致净社会福利损失。其原因可能是外部性、公共物品、信息不对称以及市场势力。
Negative externalities (e.g. pollution from a factory) mean social cost > private cost, so the market overproduces the good. Positive externalities (e.g. education, healthcare) lead to underproduction because social benefit > private benefit. Diagrams with marginal social cost/benefit curves are essential for explaining welfare loss or gain.
负外部性（如工厂污染）意味着社会成本 > 私人成本，因此市场会过度生产该商品。正外部性（如教育、医疗）导致生产不足，因为社会收益 > 私人收益。包含边际社会成本/收益曲线的图表对于解释福利损失或收益至关重要。
Public goods are non‑excludable and non‑rivalrous, leading to the free‑rider problem, so they are usually provided directly by the government. Merit goods are under‑consumed if left to the market; demerit goods are over‑consumed.
公共物品具有非排他性和非竞争性，会导致“搭便车”问题，因此通常由政府直接提供。优值品若交由市场供应会被消费不足；劣值品则会被过度消费。
Governments intervene through taxation (e.g. sugar tax, carbon tax), subsidies (e.g. on renewable energy, education), price controls (maximum and minimum prices), regulation, fines, and direct provision. State provision is often used for public goods and healthcare. Be ready to evaluate the effectiveness and unintended consequences of each policy.
政府干预的手段包括税收（如糖税、碳税）、补贴（如对可再生能源、教育的补贴）、价格管制（最高价格和最低价格）、法规、罚款以及直接提供。公共物品和医疗保健常由国家直接提供。要准备好评估每项政策的有效性及可能产生的意外后果。
5. Firms, Costs and Market Structures | 企业、成本与市场结构
Total cost (TC) = total fixed cost (TFC) + total variable cost (TVC). Average cost (AC) = TC ÷ output. Marginal cost (MC) is the extra cost of producing one more unit. Firms aim to maximise profit, which occurs where MC = MR (marginal revenue).
总成本 (TC) = 总固定成本 (TFC) + 总可变成本 (TVC)。平均成本 (AC) = TC ÷ 产量。边际成本 (MC) 是多生产一单位产品所增加的成本。企业追求利润最大化，当 MC = MR（边际收益）时利润最大。
Economies of scale reduce long‑run average costs as output expands; they arise from technical, managerial, financial, marketing and purchasing advantages. Diseconomies of scale increase average costs due to problems of coordination and communication in very large firms.
规模经济随着产量扩大降低长期平均成本，来源于技术、管理、财务、营销和采购等方面的优势。规模不经济则因特大型企业中的协调和沟通问题而提高平均成本。
IGCSE Economics covers perfect competition and monopoly briefly. Perfect competition features many small firms, identical products, no barriers to entry, and firms are price‑takers. A monopoly is a single seller with high barriers, and it can set prices, leading to higher profits but possible inefficiency.
IGCSE 经济学简要涉及完全竞争和垄断。完全竞争的特征是大量小企业、同质产品、无进入壁垒，企业是价格接受者。垄断则是单一卖者，进入壁垒高，可以自行定价，从而获得较高利润，但可能出现效率损失。
Many real‑world markets are oligopolistic, with a few dominant firms, interdependent decision‑making, product differentiation and non‑price competition. You should also review the concept of market power and the role of competition policy.
现实世界中的许多市场是寡头垄断的，存在少数主导企业、相互依存的决策、产品差异化和非价格竞争。你还应复习市场势力的概念以及竞争政策的作用。
6. Macroeconomic Aims and Possible Conflicts | 宏观经济目标与可能的冲突
Governments typically pursue five main macroeconomic aims: sustainable economic growth, low and stable inflation, low unemployment, a satisfactory balance of payments on the current account, and redistribution of income. Economic growth is measured by the annual percentage change in real GDP.
政府通常追求五大宏观经济目标：可持续的经济增长、低而稳定的通货膨胀、低失业率、经常账户收支的良好平衡，以及收入的再分配。经济增长用实际 GDP 的年度百分比变化来衡量。
Inflation is measured by the Consumer Price Index (CPI). Demand‑pull inflation occurs when aggregate demand exceeds aggregate supply; cost‑push inflation arises from rising costs of production. The unemployment rate counts those actively seeking work but unable to find it.
通货膨胀通过消费者价格指数（CPI）来衡量。需求拉动型通货膨胀发生在总需求超过总供给时；成本推动型通货膨胀则源于生产成本上升。失业率统计的是积极寻找工作但找不到工作的人数。
Conflicts may arise between policy aims: for example, rapid growth may worsen the current account deficit by boosting imports, and it might also cause inflation. Reducing unemployment could conflict with controlling inflation (the Phillips curve trade‑off). Explaining these trade‑offs is a common high‑mark exam topic.
不同政策目标之间可能存在冲突：例如，快速增长可能因增加进口而恶化经常账户赤字，并可能导致通货膨胀。降低失业率可能与控制通货膨胀相冲突（菲利普斯曲线的权衡取舍）。解释这些权衡是常见的高分考题。
7. Fiscal and Monetary Policy | 财政政策与货币政策
Fiscal policy involves government spending and taxation to influence the level of economic activity. A budget deficit is expansionary, while a surplus is contractionary. Direct taxes (income tax, corporation tax) affect income and profits; indirect taxes (VAT, excise duty) affect spending.
财政政策涉及政府支出和税收，用以影响经济活动水平。预算赤字是扩张性的，盈余则是紧缩性的。直接税（所得税、公司税）影响收入和利润；间接税（增值税、消费税）影响支出。
Expansionary fiscal policy (spending increases or tax cuts) boosts aggregate demand, helping to reduce unemployment but risking inflation. Contractionary fiscal policy (spending cuts or tax rises) cools an overheating economy. Automatic stabilisers operate without deliberate government action.
扩张性财政政策（增加支出或减税）提振总需求，有助于减少失业，但可能引发通货膨胀。紧缩性财政政策（削减支出或增税）为过热的经济降温。自动稳定器无需政府刻意行动即可发挥作用。
Monetary policy uses interest rates, the money supply and the exchange rate to achieve macroeconomic targets. A lower interest rate encourages borrowing and consumption, raising AD; a higher rate does the opposite. Central banks may also use quantitative easing to increase the money supply.
货币政策运用利率、货币供给和汇率来达成宏观经济目标。降低利率会鼓励借贷和消费，提高总需求；提高利率则相反。中央银行也可能使用量化宽松来增加货币供给。
You should be able to analyse the relative effectiveness of fiscal and monetary policy in different contexts, and discuss supply‑side policies such as education, training, privatisation and deregulation that aim to increase productive capacity.
你应该能够在不同背景下分析财政政策与货币政策的相对有效性，并讨论旨在提高生产能力的供给侧政策，如教育、培训、私有化和放松管制。
8. International Trade and Globalisation | 国际贸易与全球化
Countries trade because of the principle of comparative advantage: even if one country is more efficient in producing all goods, specialisation and trade can still benefit both. Comparative advantage is linked to lower opportunity cost.
国家之间之所以进行贸易，是基于比较优势原理：即使一国在所有商品的生产上都更有效率，专业化和贸易仍然能使双方受益。比较优势与较低的机会成本相关。
Free trade brings gains: lower prices, greater choice, access to larger markets, and technology transfer. However, some domestic industries and workers may lose out. Protectionist measures include tariffs, quotas, subsidies to domestic firms, and administrative regulations.
自由贸易带来的好处包括：更低的价格、更丰富的选择、进入更大的市场以及技术转移。然而，部分国内产业和工人可能受损。保护主义措施包括关税、配额、对国内企业的补贴以及行政法规。
Exchange rates can be floating (determined by market forces of demand and supply for a currency) or fixed (pegged by the central bank). A depreciation makes exports cheaper and imports dearer, thus potentially improving the trade balance, while an appreciation has the opposite effect. Diagrams showing the foreign exchange market are fundamental.
汇率可以是浮动的（由市场对一种货币的供求决定）或固定的（由中央银行钉住）。货币贬值使出口更便宜、进口更昂贵，从而可能改善贸易收支；升值则产生相反效果。展示外汇市场的图表是基础知识。
Globalisation refers to the increasing integration of economies worldwide through trade, investment, migration and technology. It has brought both opportunities (economic growth, poverty reduction) and challenges (inequality, environmental degradation, vulnerability to external shocks). MNCs play a key role in this process.
全球化是指通过贸易、投资、移民和技术使世界各国经济日益一体化。它既带来了机遇（经济增长、减贫），也带来了挑战（不平等、环境退化、易受外部冲击）。跨国企业在此过程中扮演了关键角色。
9. Economic Development | 经济发展
Economic development is a broader concept than economic growth; it includes improvements in living standards, health, education, and reductions in poverty and inequality. GDP per capita is a useful but incomplete measure of development.
经济发展是一个比经济增长更宽泛的概念；它包括生活水平、健康、教育的改善以及贫困和不平等的减少。人均 GDP 是衡量发展的有用指标，但并不全面。
The Human Development Index (HDI) combines life expectancy, education (mean and expected years of schooling) and GNI per capita to give a more rounded picture. Other indicators include access to clean water, literacy rates, and infant mortality.
人类发展指数 (HDI) 综合了平均寿命、教育（平均受教育年限与预期受教育年限）以及人均国民总收入，提供了更全面的衡量。其他指标包括清洁用水的可得性、识字率和婴儿死亡率。
Poverty can be absolute (a condition characterised by severe deprivation of basic human needs) or relative (living below a certain income threshold in a given society). Policies to reduce poverty include improving education, healthcare, infrastructure, and providing social safety nets.
贫困可以是绝对的（一种基本人类需求严重匮乏的状况）或相对的（在特定社会中生活在某一收入门槛以下）。减贫政策包括改善教育、医疗、基础设施，以及提供社会保障网。
Population growth affects development: a high dependency ratio can strain resources, while an ageing population creates different challenges. The demographic transition model helps explain changes in birth rates, death rates and population structure as countries develop.
人口增长影响发展：高抚养比可能给资源带来压力，而人口老龄化则带来不同的挑战。人口转变模型有助于解释随着国家发展，出生率、死亡率和人口结构的变化。
10. Review of Key Diagrams and Formulas | 关键图表与公式复习
IGCSE Economics requires you to draw, label and interpret diagrams accurately. The most important diagrams to master include:
- Demand and supply curves with shifts and market equilibrium
- Negative and positive externality diagrams showing welfare loss/gain
- PPC showing scarcity, choice and opportunity cost
- AD/AS diagrams for macroeconomic equilibrium
- Foreign exchange market diagram
- Price control diagrams (maximum and minimum price)
IGCSE 经济学要求你准确地绘制、标注和解读图表。需要掌握的最重要的图表包括：
- 带有位移的需求与供给曲线以及市场均衡图
- 展示福利损失/收益的负外部性和正外部性图表
- 体现稀缺性、选择和机会成本的 PPC 图
- 宏观经济均衡的 AD/AS 图
- 外汇市场图
- 价格管制图（最高价格和最低价格）
Make sure you can explain each diagram using correct economic terminology, such as ‘excess supply’, ‘excess demand’, ‘welfare loss’, ‘maximum price below equilibrium’ and ‘minimum price above equilibrium’.
务必要能用正确的经济术语解释每一张图表，例如“过剩供给”、“过剩需求”、“福利损失”、“低于均衡的最高限价”和“高于均衡的最低限价”。
Key formulas to memorise — and to use flexibly — include:
PED = %ΔQd ÷ %ΔP, PES = %ΔQs ÷ %ΔP, YED = %ΔQd ÷ %ΔY, XED = %ΔQd(A) ÷ %ΔP(B)
Total cost = TFC + TVC; Average cost = TC ÷ output; Profit = Total revenue − Total cost
GDP per capita = Real GDP ÷ population; Inflation rate = (CPI₂ − CPI₁) ÷ CPI₁ × 100
需要记住并能灵活运用的关键公式：
PED = %ΔQd ÷ %ΔP，PES = %ΔQs ÷ %ΔP，YED = %ΔQd ÷ %ΔY，XED = %ΔQd(A) ÷ %ΔP(B)
总成本 = TFC + TVC；平均成本 = TC ÷ 产量；利润 = 总收入 − 总成本
人均 GDP = 实际 GDP ÷ 人口；通货膨胀率 = (CPI₂ − CPI₁) ÷ CPI₁ × 100
Revising actively means practising these formulas with numerical examples and testing yourself on drawing diagrams from memory. Good luck with your end‑of‑term revision!
主动复习意味着用数字例子练习这些公式，并自我测试凭记忆画出图表。祝期末复习顺利！
Published by TutorHao | Economics Revision Series | aleveler.com
更多咨询请联系16621398022（同微信）
屏轩国际教育cambridge primary/secondary checkpoint, cat4, ukiset,ukcat,igcse,alevel,PAT,STEP,MAT, ibdp,ap,ssat,sat,sat2课程辅导，国外大学本科硕士研究生博士课程论文辅导